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Operator
Good day, ladies and gentlemen, and welcome to the Cerus Corporation Q2 2018 Earnings Conference Call. (Operator Instructions) As a reminder, this call is being recorded. I would now like to introduce your host for today's conference, Tim Lee, Investor Relations Director. Sir, you may begin.
Tim Lee
Thank you, operator, and good afternoon. I'd like to thank everyone for joining us today. With me on the call are Obi Greenman, Cerus' President and Chief Executive Officer; Dr. Richard Benjamin, our Chief Medical Officer; Dr. Laurence Corash, Chief Scientific Officer; Kevin Green, Cerus' Chief Financial Officer; Vivek Jayaraman, our Chief Commercial Officer; and Carol Moore, our Senior Vice President of Regulatory Affairs and Quality.
Cerus issued a press release today announcing our financial results for the second quarter ended June 30, 2018, and also describing the company's recent business highlights. You can access a copy of this announcement on the company's website at www.cerus.com.
I'd like to remind you that some of the statements we will make on the call relate to future events and performance rather than historical facts and are forward-looking statements. Examples of forward-looking statements include those related to our future financial and operating results, including our 2018 financial guidance and goals, operating expenses and gross margin; commercial development efforts, future growth and growth strategy; future product sales; product launches; ongoing and future clinical trials; ongoing and future product development; and our regulatory activities as well as the timing of these events and activities.
These forward-looking statements involve risk and uncertainty that can cause actual events, performance and results to differ materially. They are identified and described in today's press release and under Risk Factors in our Form 10-K for the year ended December 31, 2017, and our Form 10-Q for the quarter ended June 30, 2018, which we will file shortly. We undertake no duty or obligation to update our forward-looking statements.
On today's call, we'll begin with opening remarks from Obi followed by Vivek, who will provide an update on commercial operations. Kevin will then review our financial results. And finally, Obi will conclude with closing remarks.
And now it's my pleasure to introduce Obi Greenman, Cerus' President and Chief Executive Officer.
William M. Greenman - President, CEO & Director
Thank you, Tim, and good afternoon. We are pleased to report another solid quarter in which we made good progress on the top line, on our pipeline and on the bottom line. From a top line perspective, our commercial momentum continued into the second quarter with our sales team delivering another strong performance. Vivek and Kevin will provide additional details in their respective sections, but at the high level, second quarter product revenue totaled $15.4 million, representing a 62% increase compared to the second quarter of 2017.
We had a solid first half performance and based on current visibility into our commercial prospects for the remainder of the year, we are raising our 2018 product revenue guidance range to $56 million to $58 million compared to our previous range of $53 million to $55 million. Our new guidance range represents growth of 29% to 33% over full year of 2017 product revenue. Our increased revenue projections are the result of growing global demand for INTERCEPT. We believe demand has been driven by increasing awareness of the risks associated with transfusion-transmitted infections and the benefits of pathogen reduction as the most clinically proven and comprehensive safety measure.
The ability to preemptively address the risks of emerging pathogens was a factor in the decision by the U.S. Navy Bureau of Medicine to mandate pathogen-reduction technology for all apheresis platelets collected by the Navy Blood Program. With 5 sites around the globe expected to transition to routine use in the coming months in addition to the collection site at Walter Reed, we are proud to be able to assist the Navy Blood Program in their important mission.
Even multiple state-of-the-art assays for an established transfusion-transmitted pathogen can have limitations. A recent publication out of Europe documented 9 cases of hepatitis B transmission via blood components slide testing by highly sensitive nucleic acid and hepatitis surface antigen assays. Fortunately, the blood center in Slovenia has used the INTERCEPT system for platelets for over a decade now, and this same study documented the prevention of hepatitis B transmission in 6 patients who received INTERCEPT-treated blood platelet components from donors with undetected hepatitis B infection.
Beyond transmitted disease -- transfusion-transmitted disease protection against emerging pathogens like Zika and Babesia, INTERCEPT also addresses the inherent deficiencies of the current blood testing paradigm. At a fundamental level, we believe there is a paradigm shift underway introducing the infectious risks of transfusions. Blood centers, hospitals and clinicians are increasingly aware of the risks to the blood supply and are not asking if they can afford pathogen reduction, but instead, can they afford not to offer pathogen reduction to help ensure the safest transfusions possible.
For example, at the FDA's recent Blood Products Advisory Committee meeting last month, the risk of bacterial contamination to the safety of the nation's blood supply was clearly acknowledged. We believe that the FDA continues to have strong interest in adding additional safeguards for the U.S. platelet supply. It was also encouraging to hear speakers voice a sense of urgency in finalizing the guidance document. What is perhaps most interesting, however, is that we believe we are seeing product demand driven by medical communities' desire to improve patient safety now as opposed to a scramble to respond to a federal government mandate. This speaks to the compelling clinical utility and value that INTERCEPT offers.
With that let me turn it over to Vivek to provide an update on our Q2 commercial results. Vivek has now been with the company for almost 2 years, and we're excited to see the impact of his leadership on the commercial organization. The global commercial team is aligned around our corporate mission and goals and is attracting the talent we need to scale for the opportunities ahead of us.
Vivek K. Jayaraman - Chief Commercial Officer
Thank you, Obi. I'm pleased to report that customer interest in and adoption of INTERCEPT increased meaningfully in Q2. We experienced increased product demand in our Europe, Middle East and Africa region, or EMEA, as well as in North America. While France and the U.S. drove the majority of our revenue growth this quarter, we were also pleased to see an increasing number of countries and customers adopt our technology around the world.
In the U.S., the market demand for pathogen reduction is strengthening as our commercial team educates the blood transfusion community on the benefits of pathogen reduction. As Obi mentioned, we think that awareness of the risk of transfusion-transmitted infections is increasing. As an example, a recent article in the Morbidity and Mortality Weekly Report, which is published by the Centers for Disease Control and Prevention, showcased the need for additional safety measures for platelets. The article highlighted that even when blood centers and hospitals follow the most current bacterial detection protocols, the risk of transfusion-related infections and fatalities persist.
The article detailed 2 separate clusters of transfusion-associated bacterial sepsis with split-dose conventional platelets: one in Utah and the other in California. Despite utilizing current and safety measures, bacterial contamination of platelets from 2 separate donors resulted in 3 patient deaths and 1 additional case of severe sepsis. These events were avoidable. We believe that pathogen reduction offers significant advantage over bacterial detection technologies. As an example, pathogen reduction offers the ability to address a broader range of pathogens and preemptively reduce the risk from emerging pathogens for which detection tests are not currently available.
With respect to commercial progress in the U.S., we now have over 50 blood centers producing and over 130 hospitals transfusing INTERCEPT platelets. Five of our blood center customers have received BLA approvals, and we are anticipating approval for 9 other centers over the coming quarters. As a reminder, blood centers typically supply hospital customers in multiple states, and BLA approvals are a requirement for shipping blood components across state lines. It is our goal that all U.S. patients have access to the safest blood products possible, and BLAs are critical for many blood centers to reach their full customer base.
Given our steady progress developing the market, we expect U.S. demand for INTERCEPT platelets to strengthen and become a key growth driver for the company. We see evidence of clinical acceptance of and demand for pathogen-reduction technology independent of the publication of an FDA guidance document. We believe accelerated product uptake is not dependent on the FDA issuing a final guidance document, but instead is driven by clinical demand for safe blood.
Turning to our international opportunities. We continue our efforts in Germany to work with blood centers and the Paul-Ehrlich-Institut to garner regulatory approvals for customers to produce and provide INTERCEPT-treated platelets to hospitals. We anticipate that hospitals will then be able to realize the operational benefit of another day of platelet shelf life, while also realizing the financial benefits of improved reimbursement, all the while improving patient safety. The foundation we are laying in Germany this year is expected to translate into additional revenue for Cerus in 2019 and beyond. With an estimated 580,000 units of platelets produced annually, we believe Germany is the largest market opportunity for INTERCEPT platelets in Europe.
Last quarter, our distributor in Poland was awarded a tender for INTERCEPT platelets by the Warsaw Blood Center, which is the largest blood center in Poland and an extremely influential reference account across the Eastern Europe. By winning the tender, we create a foothold in a very important part of the world. The tender award establishes a strong presence in the Polish market, which we estimate to be at more than 100,000 platelet units transfused annually.
Finally, in EMEA, France was once again a key contributor to our strong quarterly performance. As we noted during our Q1 conference call, EFS is now at 100% utilization. While the dual-storage kit is now available in France, sales in Q2 were predominantly driven by the single-dose kit configuration. Given the cost and operational benefits of the dual-storage kit, we anticipate EFS to shift a meaningful portion of their production to the DS format this year.
While the EFS conversion to DS may provide an improved margin to Cerus, this transition will likely impact revenue in the back half of 2018 and through 2019. Overall, we are enthusiastic about the full adoption we've seen in France and also in the accelerated uptake we are experiencing in the U.S. In summary, we believe we are well positioned to drive INTERCEPT adoption on a global basis.
Now let me turn the call over to Kevin to provide an update on Q2 financial results.
Kevin D. Green - VP of Finance & CFO
Thank you, Vivek, and good afternoon everyone. Today, we reported second quarter product revenue of $15.4 million, a 62% increase compared to the $9.5 million reported during Q2 of 2017. On a year-to-date basis, product revenue totaled $29 million, up 75% compared to the $16.5 million reported during the first half of 2017.
Government contract revenue during the second quarter totaled $4 million compared to $1.7 million during the prior year period. On a year-to-date basis, government contract revenue was $7.5 million compared to $3.1 million during the 2017 period.
Worldwide demand for INTERCEPT kits increased more than 70% when comparing Q2 of 2018 to the prior year period with the greatest percentage of growth coming from the U.S. When looking at the first half of 2018 compared to that of 2017, worldwide demand for INTERCEPT kits increased more than 80%.
Platelet kit sales continue to increase their relative contribution to our overall product revenue with platelet kits now accounting for approximately 90% of total product revenue compared to approximately 85% in the prior year. As Obi noted in his earlier remarks, given the outperformance in Q2 and our strong conviction in the commercial outlook, we are raising our full year product revenue guidance to a range of $56 million to $58 million from our previous range of $53 million to $55 million.
Now let's turn from revenue to other second quarter results, starting with our reported gross margins. Gross margins on product sales for the quarter were 50% compared to 54% for Q2 of 2017. Year-to-date gross margins were 48% compared to 51% during the first half of 2017. The year-over-year change in gross margins was largely attributable to the volume-based pricing associated with the current high-volume customers who contributed meaningfully to our 2018 revenue.
I'd now like to discuss operating expenses, which totaled $24.3 million during the quarter compared to $23 million during Q2 of 2017. Specifically, SG&A expenses during the quarter accounted for $14.4 million compared to $14.1 million in Q2 of 2017, essentially flat year-over-year. Similarly, on a year-to-date basis, SG&A spending in the first half totaled $28 million compared to $27.8 million during the first half of 2017. With our sales and back office teams largely in place for some time now, we are continuing to realize the leverage of the business model with stable SG&A costs and a growing top line. And while we anticipate that we will continue to selectively add investments in SG&A, we expect those incremental SG&A investments to be modest compared to our anticipated top line growth.
Research and development expenses for the quarter totaled $9.9 million compared to $8.9 million during the year prior. The increase was primarily tied to higher costs associated with the clinical development of the INTERCEPT red blood cell system for preparatory activities to launch both our planned CE Mark submission in Europe and our clinical activities in the U.S. On a year-to-date basis, R&D expenses totaled $19.3 million compared to $18 million in the prior year period. As clinical activities tied to our U.S. red cell program progress and accelerate, we expect R&D expenses to increase with a corresponding increase in BARDA-funded revenues.
Operating losses during the second quarter were $12.6 million compared to $16.2 million for the second quarter of 2017. Throughout the first half, operating losses totaled $25.9 million compared to $34.3 million in the first half of 2017.
Net loss for the second quarter narrowed to $13.3 million or $0.10 per diluted share compared to a net loss of $17.1 million or $0.16 per diluted share for the prior year period. Year-to-date, net loss also narrowed to $27.2 million or $0.21 per diluted share compared to a net loss of $35.7 million or $0.34 per diluted share in the first half of 2017. In terms of our balance sheet, we ended the quarter with approximately $112 million of cash, cash equivalents and short-term investments on hand.
We believe that our business is at a positive inflection point and that we are well positioned to execute on our business strategies to maintain and accelerate the global commercial momentum of INTERCEPT; advance our red cell program both in Europe and in the U.S.; and lastly, bring pathogen-reduced extended storage cryoprecipitate to hospitals and patients.
With that, let me turn the call back over to Obi.
William M. Greenman - President, CEO & Director
Thank you, Kevin. I want to conclude with an update on our pipeline programs. We expect these pipeline initiatives to be major revenue growth drivers in the years ahead.
Starting with our red cell program in Europe. We are on track to file for the potential CE Mark approval of our red cell platform this calendar year and are engaging our notified body, TÜV, in pre-submission meetings this month. In the U.S., we announced an additional $15 million in incremental funding from the Biomedical Advanced Research and Development Authority, or BARDA. These proceeds provide supplemental support for our chronic and acute anemia studies. With this amendment, our total contract potential with BARDA now exceeds $200 million to largely fund the development effort and manufacturing scale up for the INTERCEPT red cell launch in the U.S.
We also continue to advance our INTERCEPT pathogen-reduced cryoprecipitate, or cryo program. We're happy to report that we signed today our second regional partnership with The Blood Center of New Orleans. Launch planning is underway, and there continues to be strong clinician interest in having this product readily available to treat critically bleeding patients. We have decided to leverage some capacity expansion changes for the INTERCEPT plasma set in the U.S. and have chosen to aggregate those changes with the INTERCEPT cryo submission into a single PMA amendment targeted in the second half of next year. With the anticipated 180-day review process, we expect commercial launch in 2020. As this opportunity takes shape, we look forward to providing future updates on the expansion of our manufacturing partnerships and launch preparation.
This is an exciting time for Cerus as we push forward with our mission to make INTERCEPT the standard of care to improve the safety and availability of blood components around the world. As awareness of risks of bacterial -- bacterially contaminated blood components rises, we believe there is an increasing sense of urgency growing within the blood banking community to improve safety. The current testing paradigm is not sufficient, and patients and physicians deserve safer blood and an assurance that it will be there when they need it. We are confident that INTERCEPT is the best solution to address these concerns given its ability to treat both known and emerging pathogens with a single platform for multiple products. Furthermore, we are expanding our portfolio [in order to] pathogen reduce all 3 major blood components with our planned CE Mark filing for the INTERCEPT red blood cell system later this year.
In closing, I'd like to acknowledge the efforts of the Cerus team. The year-to-date results were encouraging and are clearly a product of dedicated teamwork and strong cross-functional collaboration. I know that my colleagues share my conviction that our work is just beginning and that we have an important responsibility to ensure the smooth and rapid transition to a new standard of care in blood safety.
Operator, please open the call for questions.
Operator
(Operator Instructions) Your first question comes from Josh Jennings of Cowen.
Joshua Thomas Jennings - MD and Senior Research Analyst
I was hoping to start with the U.S. business and the platelet opportunity. I mean, despite the strength in the first half of the year, it seems that there's still a long way to go in terms of the runway here for the U.S. franchise. Appreciate some of the data you shared in terms of the, I think, 50 blood center customers, 130 hospitals that are using INTERCEPT platelets. But can you give us an idea about where you think you've -- how deeply you've penetrated the U.S. market? Are we still in the single digits here? And then also just on the BLA side, 5 approvals -- customer approvals. I guess what has been the delay -- what's driven the delay? And how confident are you that you can see those start to open up in the coming quarters?
William M. Greenman - President, CEO & Director
Thanks, Josh. I'll let Vivek have all these questions because he's closest to it.
Vivek K. Jayaraman - Chief Commercial Officer
Yes, Josh, thanks for the question. In terms of market share in the U.S. or percent penetration, at this point in time, we're not reporting out those metrics. But I'll maybe bring you back to comment we made a few quarters back about working with the U.S. blood centers around optimizing their production and seeing them start to adopt these production optimization metrics into their practice. And we're seeing now the levels of INTERCEPT they're producing and then subsequently, the hospital demand they can meet really driving growth. And I'd say we're still very much in the early days of that process. So there's a significant amount of headroom still left in the U.S. marketplace. On the BLA front, as mentioned, that's going to be critical because most blood centers do see supply customers in multiple states and without the BLA are constrained in terms of only being able to supply in those states where they manufacture. It's probably imprudent for us to speculate on individual regulatory processes between a blood center and the FDA. But having said that, our deployment organization and team are working closely with the blood centers to ensure that whatever questions arise can be answered expeditiously. And certainly, the progress we've made with respect to receiving BLA today gives us reasons for encouragement.
Joshua Thomas Jennings - MD and Senior Research Analyst
Excellent. And I just wanted to follow up on the cryo opportunity. Thanks for the updates there today. But maybe you can just help us [and maybe] more details in terms of the steps that are required. I think you're doing some in vitro data generation. And then anything else that needs to be done on your side before you can submit the supplemental filing? And then secondarily, just I think there was a new Internal Medicine article last week about a mortality benefit being demonstrated by administering thawed plasma to trauma victims en route to a trauma center. Just wondering if -- how big of the total FFP addressable market is that kind of pre-hospital trauma segment.
William M. Greenman - President, CEO & Director
Yes, thanks, Josh. I'll field the first question and then turn it over to Larry to talk about the New England Journal of Medicine article. So with regard to the class submission, basically, it's in vitro studies looking at the coagulation profile in the INTERCEPT cryoprecipitate product. And so those studies are underway now. I think the long pole in the tent as far as the time line is really to get the stability data we need for submissions. We have a lot of experience in doing studies like this for INTERCEPT plasma. And as a reminder, this is an amendment to the INTERCEPT plasma PMA, and so it's something that we're very familiar with. We have clear pathway defined with the FDA as to what's required, and it's just completing the studies and getting the stability time points to be able to submit that amendment. And then the second question, I'll turn it over to Larry with regard to pre-hospital use of plasma and sort of the overall interest in trying to address trauma mortalities with early plasma and also with cryoprecipitate.
Laurence M. Corash - Co-Founder, Chief Scientific Officer, Senior VP & Corporate Director
So hemorrhagic trauma is the leading cause of death for people under the age of 45 in the United States. So it's a very significant population of patients, and that article clearly showed a benefit for plasma pre-hospital. Other studies have shown that a critical component in plasma is fibrinogen. And therefore, we see the value in 5-day thawed cryoprecipitate, which can be used pre-hospital to address the need to elevate fibrinogen levels as early as possible. So we see this article as validation that earlier transfusion pre-hospital has tremendous value to change outcomes for a substantial population of patients.
Operator
Your next question comes from Drew Jones of Stephens Inc.
Andrew Luten Jones - Research Analyst
Looking -- just trying to get a feel for maybe how conservative the guidance is for the back half of the year. Maybe one way to do that would be if we could parse out the impact on French revenue from moving to dual kits from single dose. Is that something you can give us a little bit of a feel around?
William M. Greenman - President, CEO & Director
Yes, Drew, I'll turn that over to Kevin. I think he's got some insights into that.
Kevin D. Green - VP of Finance & CFO
Sure, Drew. So we've mentioned on the Q1 call that we exited Q1 with the French of 100%. In fact, we saw them continue with full utilization of INTERCEPT throughout the quarter. What we know is that we've begun selling the double-dose kits to the French starting in late Q2 and that continues into Q3. Their guidance to us is that they want to convert and be fairly aggressive with their conversion to the double-dose platform. And so we feel that there will be an impact to the top line as a result, and so our guidance contemplates that impact.
Andrew Luten Jones - Research Analyst
Okay. And then thinking about other opportunities that are going to come online here, Germany, obviously pretty sizable opportunity. When you look at kind of accreditation for centers there, is that something that looks like we're going to see revenue contribution in the first half of 2019? Or is maybe that more of a second half of 2019 opportunity?
William M. Greenman - President, CEO & Director
I'll let Vivek handle that one.
Vivek K. Jayaraman - Chief Commercial Officer
Yes, so I think we'll start to see some modest revenue contribution in the first half, Drew, and that all start to scale through the year as more centers come online. Again, similar to the question about BLAs, it's certainly a bit speculative when you're trying to weigh in on regulatory clearances. But our deployment organization and regulatory teams there in Germany have been working very closely with the German blood centers to get those clearances and applications into the Paul-Ehrlich-Institut. So we feel confident that -- and frankly, the extent of customer interest in working with us has been really encouraging. So we anticipate that we'll start to see some of the impact of that in the first half part of the year.
William M. Greenman - President, CEO & Director
The other thing, Vivek, you might want to comment on is just the talent of the team that we've sort of recruited and the focus on the [EMA] submissions, and so how we're facilitating that (inaudible) blood centers.
Vivek K. Jayaraman - Chief Commercial Officer
Yes, no, it's a good point. We have -- since we learned of the increased reimbursement in Germany, we've recruited really some strong cross-functional talent to the German team. So in the areas of regulatory affairs deployment, hospital sales and also continue to do a lot of work on the health policy and government advocacy side. And so our understanding of the clinician and hospital-level interest in demand -- in INTERCEPT is growing, I'd say, a significant margin of it really in the past 1.5 quarters. And so it's encouraging, too, as an aside to see the type of talent we continue to attract to the organization because ultimately, it's our team on the ground in the different countries that are going to tell the tale and drive the results. And so we've been pleased with our newly hired German team today. And that builds upon a strong group of employees that we've had in Germany for a period of time now.
Operator
Your next question comes from Craig Bijou with Cantor Fitzgerald.
Craig William Bijou - Research Analyst
Obi, maybe I want to start with you, and I appreciate your comments that the medical community is driving some of the demand for pathogen reduction. But I guess I wanted to see -- maybe kind of drill into your thoughts on BPAC meeting from couple weeks back and just kind of the tone of the meeting relative to prior meetings and then just kind of what you see as the next steps over the next 6 months and maybe into '19.
William M. Greenman - President, CEO & Director
Thanks, Craig. I think my primary takeaway from it was that primary culture of platelets is no longer seen as sufficient, and that really was something that was strongly set at the meeting by all the participants. But since I wasn't at the meeting and Richard and Carol and Larry were, maybe I can let them comment because I think they had some key takeaways from the BPAC meeting.
Richard J. Benjamin - Chief Medical Officer
Maybe I can step in. Thanks, Craig. It's Richard Benjamin. I think the meeting reaffirmed the FDA's intention to move forward with guidance. I think everyone in the room didn't contest the issue that there was a real need, that bacterial safety is an unmet need. And there were many options discussed that gave us a great opportunity to present an update on what we believe we've accomplished and that we can effect. So I walked away with, I think, a positive view on the outcome.
Carol M. Moore - SVP of Regulatory Affairs, Quality and Clinical
This is Carol. I'd like to just go back and say that Cerus was invited to make a presentation as an expert in the area which allowed us to provide some real clarity with regard to the data that we have and the value that we're seeing and the experiences that we're having in the market. And I think that was extremely helpful. It allowed us to answer questions on the product and the process. And to one question we were asked, could we supply the entire market if there was a mandate to convert 100% to pathogen activation, we were able to address that positively saying that we could do that. And I think the meeting for Cerus was really a verification of the fact that people are very interested in using the pathogen-activated products, specifically INTERCEPT, and that they do see this as an optimal solution, although every blood center is going to have to figure out what they would like to do. I think that it continued to come up that we were a very good solution for the important questions of bacterial [seed] when it comes to treating platelets.
Laurence M. Corash - Co-Founder, Chief Scientific Officer, Senior VP & Corporate Director
So I think one of the notable aspects of this meeting was that prior to our presentation, 5 different groups presented 5 different solutions to enhance bacterial detection, none of which clearly demonstrated optimal performance and the statistician from BPAC commented on the limited amount of clinical data. In contrast, we presented a single solution for viruses, bacteria, parasites and white blood cells and extensive clinical data in Europe for more than 10 years showing the efficacy of the technology. So I think that it was a remarkable contrast to a single solution as opposed to multiple unvetted solutions.
Craig William Bijou - Research Analyst
Great. Very, very helpful perspective. Kevin, maybe for you on the lower gross margin. Due to the lower selling prices for the higher volume, any color there? Is that U.S.-based? Is that Europe? And then, I guess, just how -- is that a new strategy? And how big of a piece of your strategy will that be going forward?
Kevin D. Green - VP of Finance & CFO
So historically, we've offered volume-based pricing to our distributors. As we have larger and larger customers signing up, we want to incentivize them to increase their penetration. So it is not just a European or U.S. metric. It really has to do with the size and purchasing power of certain customers. And so it's across multiple customers.
William M. Greenman - President, CEO & Director
And then but how does that evolve over time is part of the question, Kevin.
Kevin D. Green - VP of Finance & CFO
Well, as it evolves over time and as those customers contribute more and more to our top line, it will have an effect. But also, as customers convert to the double dose, which is fairly nascent right now, we see a pickup in gross margins.
William M. Greenman - President, CEO & Director
And I think the other part I was sort of wanting to get at is just the price volume curves that we have with our existing manufactures. As we -- as our volumes grow, we do expect to see an improvement in margins over time as just a function of scale.
Operator
(Operator Instructions) Your next question comes from Catherine Schulte of Baird.
Catherine Walden Ramsey Schulte - Senior Research Analyst
Just wondering, first, if you could talk about your progress with the American Red Cross? I'd love to get an update on how they're marketing INTERCEPT platelets today and how that's changed over the last year or so.
William M. Greenman - President, CEO & Director
Again, I'll turn it over to Vivek since he's closest to the dynamic in the U.S.
Vivek K. Jayaraman - Chief Commercial Officer
Yes, thanks for the question, Catherine. I'd say that the single biggest driver of change has been really the rate at which they have adopted the production optimization steps at their manufacturing facilities and how that's resulted in a pretty significant increase in the amount of INTERCEPT platelets that they're able to produce and then ultimately distribute to their hospital customers. So that's been the single biggest driver of growth, and there's still quite a bit of headroom there. They presented last year at the AABB about their intention to take on production optimization steps. And so the results we saw -- have seen with them through the first half this year, I think, are the byproduct of those steps really starting to come into practice.
Catherine Walden Ramsey Schulte - Senior Research Analyst
Okay. That's helpful. And then can you give some commentary on how the 5 blood centers who have received their BLAs have ramped their volumes since receiving those approvals? And then what's the status of the American Red Cross BLA?
Vivek K. Jayaraman - Chief Commercial Officer
So I'll start with the American Red Cross BLA status first. We know they're actively pursuing BLA clearance, and we're working it with them on that. As with other regulatory situations, really the specific dialogue between them and the FDA is something to which we're not a party. But we know that continues to be something that's of considerable interest in them because they do have many hospital customers that are in states outside where they do not currently have manufacturing facilities producing INTERCEPT. With respect to the blood centers that have received BLAs, really what we're seeing now is them starting to meaningfully send product to out-of-state hospitals. And a few of them have, similar to the Red Cross, aggressively adopted the production optimization strategies and now they're being able to sort of nicely tie supply and demand. And for the others, they're in the process of picking up those production steps. So we certainly see that we have both demand growing from the hospital side and supply growing from the blood center side. And so the extent that we can knock down barriers that -- and facilitate tying those 2 things together, we're just trying to methodically go about that process.
Catherine Walden Ramsey Schulte - Senior Research Analyst
Great. And last one from me. We've touched on the BPAC meeting. Just curious if you had any conversations with the FDA since then. It seems like there is a push to potentially switch or go straight to a final guidance. So any change on FDA thinking there?
Carol M. Moore - SVP of Regulatory Affairs, Quality and Clinical
This is Carol, again. We talk to the FDA all the time about our ability to supply, our progress towards expanding the utility of our license applications. We haven't talked about the guidance document specifically. But because we're in such regular communication, they are fully aware of our capability and are not -- do not hesitate to reach out to us to ask questions. I think that might be helpful as they prepare whatever additional remarks they're going to make on the guidance document.
William M. Greenman - President, CEO & Director
Yes, I think it's sort of imprudent for us to sort of speculate as to whether it's going to come out as a final guidance or a revise draft as would -- as what is described in the current publication list for CBER this year. They referenced a revised guidance document coming out this year, not a final.
Operator
And I'm showing no further questions at this time. I'd like to turn the call back over to Obi Greenman for closing remarks.
William M. Greenman - President, CEO & Director
Thank you. I would like to announce that we will be hosting an institutional investor meeting just after the AABB meeting on October 16 in Boston. Senior management will provide a comprehensive review of our commercial operations there and pipeline opportunities, and several guest speakers will provide perspectives on their experience with the INTERCEPT Blood Systems and the evolving role of pathogen reduction in transfusion medicine. We hope to see many of you there. And thanks again for joining the call today and for your interest in Cerus.
Operator
Ladies and gentlemen, thank you for participating in today's conference. This does conclude the program, and you all may disconnect. Everyone, have a wonderful day.