Breakthroughs Blog: Vaccines

Women are steadily reshaping the landscape of global health research. In 2022, they made up 41 percent of researchers worldwide, representing considerable progress toward closing the gender gap in science. Yet women remain underrepresented in many scientific fields and in senior roles, are published and cited less frequently than men, and file far fewer patent applications. Despite these systemic barriers, women researchers are having an outsized impact on global policy and progress. Research led by women is more likely to address topics aligned with the Sustainable Development Goals, and publications with women authors are more frequently cited in policy documents.  Expanding women’s participation and leadership in science is not just a matter of equity, it is essential to ensuring research priorities reflect women’s lived experiences. Although women spend more of their lives in poor health than men, only 1 percent of global health research and development funding targets female-specific conditions beyond cancer. Even as gaps persist, women scientists are already at the forefront of innovation, driving cutting-edge technologies that could transform the future of global health. Advancing promising HIV vaccine strategies Developing an HIV vaccine capable of preventing infection has long challenged researchers due to the virus’s extraordinary ability to mutate and evade the immune system. Still, many experts believe such a vaccine will be essential to ending the global pandemic.A Phase 1 trial, launched in August of last year, is evaluating an investigational HIV vaccine candidate designed to induce an immune response scientists believe could effectively target vulnerable parts of HIV-infected cells. Three distinguished female principal investigators—Dr. Tariro Makadzange of the Mutala Trust, Dr. Theodorah Rirhandzu Ndzhukule of the Desmond Tutu Health Foundation, and Dr. Limakatso Lebina of the Africa Health Research Institute—are overseeing the study across clinical trial sites in Harare, Zimbabwe; Cape Town, South Africa; and Durban, South Africa, respectively.  Another Phase 1 trial, launched just last month, is testing a different novel approach. Researchers are evaluating whether highly specialized vaccine immunogens, delivered in a specific sequence, can train the immune system to produce broadly neutralizing antibodies against HIV, widely considered one of the keys to achieving broad protection against the virus. The trial is led by Dr. Linda-Gail Bekker, CEO of the Desmond Tutu Health Foundation and a leading HIV clinician-scientist. These vaccines have the potential to transform the lives of women and girls, who bear a disproportionate burden of HIV and AIDS, particularly in sub-Saharan Africa. The leadership of these scientists underscores how women researchers are driving forward breakthroughs that address urgent global health needs. Trialing promising TB vaccine candidates New tuberculosis (TB) vaccine candidates also hold promise for reshaping global TB efforts, particularly as rising drug resistance makes the disease harder to fight. The only currently approved TB vaccine is more than 100 years old and is effective at preventing some forms of TB in infants but offers limited protection against pulmonary TB in adults.  One next-generation vaccine candidate, MTBVAC, was co-designed by Dr. Brigitte Gicquel of the Institut Pasteur, who is a pioneer in TB research. MTBVAC is the only live-attenuated candidate in the pipeline, meaning it contains a weakened form of the bacteria that causes TB, and aims to offer more effective, longer-lasting protection for newborns while also preventing TB disease in adolescents and adults, for whom no effective vaccine exists.In a Phase 1a/2b trial published last year, MTBVAC was found to be safe and capable of generating immune responses comparable to or stronger than the current TB vaccine. The study was led by Dr. Angelique Luabeya of the South African Tuberculosis Vaccine Initiative, who has considerable experience leading novel TB and COVID-19 vaccine trials. MTBVAC is now being evaluated in a Phase 2 trial in people living with HIV, co-chaired by the aforementioned Dr. Limakatso Lebina. Another leading vaccine candidate, M72/AS01E, is currently undergoing a large Phase 3 trial to determine whether it can protect adolescents and adults from pulmonary TB. Dr. Lee Fairlie of Wits RHI at the University of the Witwatersrand, an infectious disease expert with extensive experience leading major clinical studies, is serving as national principal investigator for the trial in South Africa. These vaccine candidates could dramatically alter the trajectory of the global TB epidemic, reflecting the critical contributions of women researchers in advancing solutions to one of the world’s oldest and deadliest infectious diseases. Driving forward antimalarial drugs for a long-excluded group Last fall, a global consortium launched the first-ever Phase 2 adaptive platform trial evaluating the efficacy and safety of antimalarial drugs during the first trimester of pregnancy. This landmark study addresses a long-standing gap in safe and effective evidence-based treatment options for pregnant women at risk of malaria. Pregnant women, particularly those in early pregnancy, have historically been excluded from clinical trials, leaving major unanswered questions about how best to treat malaria and other conditions in this high-risk group.  Among the study’s co-principal investigators are Dr. Myriam El Gaaloul from the Medicines for Malaria Venture, Dr. Stephanie Dellicour from the Liverpool School of Tropical Medicine, and Dr. Hellen Barsosio of the Centre for Global Health Research at the Kenya Medical Research Institute, who bring deep expertise in clinical trials, malaria, and maternal and newborn health. This trial has the potential to not only reshape care for pregnant women at risk of malaria but also set a powerful precedent for more inclusive research. It illustrates how greater gender diversity in research leadership can help ensure studies prioritize and better reflect the needs of the people they aim to serve. Across the global health innovation pipeline, women scientists are driving transformative progress. Accelerating gender diversity across research teams, investing in early-career women researchers, and strengthening pathways to leadership will advance gender equity while ensuring that scientific breakthroughs are more inclusive, accessible, and reflective of the needs of all people. 

Sino Biological, Inc. recently announced an effort to accelerate the development of critical research tools to support the global scientific community in advancing Nipah virus research, as new cases of the deadly pathogen have raised international concerns. Sino Biological has launched a series of proteins, which researchers can use in the lab to better understand how the virus infects cells and how to design antibodies that might successfully target the virus. These proteins are based on the currently circulating Nipah virus strains, so could help boost the accuracy and relevance of research efforts. There are currently no approved vaccines or specific antiviral treatments for Nipah, underscoring the importance and urgency of research and development efforts to advance vaccines and therapies. Newly shared results from the first blinded, randomized non-inferiority trial comparing one versus two doses of HPV vaccine show that a single dose provided similar protection to the two-dose schedule. These results verify a previous study, which undergirded the World Health Organization’s 2022 recommendation of the lower-dose regimen, which has since led to its adoption by almost 90 countries. The lower-dose regimen can help boost access and uptake of the HPV vaccine by reducing the cost and complexity of vaccination for public vaccine procurers, health care providers, and patients. Specifically, the researchers found that a single dose was 97 percent effective against HPV infections in a large study with 20,000 participants, who were studied for up to five years post-vaccination. Last week, the Drugs for Neglected Diseases initiative (DNDi) announced a new memorandum of understanding with the African Population and Health Research Center aimed at helping translate African-led research into transformative innovations and health policies. Specifically, the agreement involves coordination to promote joint research, advance evidence-based programming and policymaking, and facilitate capacity-building. The memorandum also outlines collaborative commitments to ethical, value-enhancing data-sharing activities, including generating high-quality evidence and creating a robust system to preserve and share findings. 

The Coalition for Epidemic Preparedness Innovations (CEPI) is providing $30 million to support the collaborative development of an updated Ebola vaccine, enhancing global preparedness against this deadly health threat. The updated vaccine will build on Merck’s vaccine, which has a complex and expensive manufacturing process that is vulnerable to supply chain disruptions, as well as logistical challenges, including an ultra-cold storage requirement, which is unsustainable in remote, low-resource settings that have a higher likelihood of outbreaks. The partners will update the current manufacturing processes, hopefully lowering costs and making the vaccine easier to manufacture and store. The reduced production costs are expected to enable Merck to make the vaccine available in low- and middle-income countries at a more affordable price. The updated vaccine will be compared against the current vaccine in a Phase 3 trial, also funded by CEPI. A new study led by the University of Cambridge suggests that mpox may be capable of spreading asymptomatically, meaning that transmission may be more widespread in Africa than previously thought. The researchers analyzed blood samples from 176 healthy adults with no known exposure or history of infection in Nigeria, which has experienced intermittent outbreaks of the virus for decades. At least five participants had mpox antibodies in their blood, suggesting recent infection, but none of them reported any symptoms. These findings will inform how public health authorities track the spread of the virus, which has been behind several major outbreaks in recent years. This research also underscores the urgent need for improved vaccines and other tools for mpox. ENABLE-2, an antibiotic drug development engine backed by the Swedish Research Council and the National Research Programme on Antibiotic Resistance, is supporting the Global Antibiotic Research & Development Partnership (GARDP) to develop a novel class of antibiotics. The researchers plan to use an innovative approach by targeting a specific protein complex that bacteria use to strengthen their outer membrane. The ultimate goal of the work is to develop a new treatment for priority antibiotic-resistant bacterial pathogens. GARDP also aims to ensure the new treatment can be made accessible globally, including in low- and middle-income countries, which face a particular threat from antibiotic resistance. 

Earlier this week, the Global Health Technologies Coalition (GHTC) and partners brought more than 25 innovative global health technologies to Capitol Hill to highlight how US government investments in global health research and development (R&D) are saving lives in the United States and around the world. Each technology displayed—whether a vaccine, diagnostic, drug, device, or nutrition solution— demonstrate how these investments not only protect the world’s most vulnerable people but also strengthen America’s own health security, help prevent pandemics, and fuel high-quality US jobs and economic growth. The exhibit offered a snapshot of a larger story of how the United States is doing well by doing good. Between 2007 and 2022, the US government invested just under $46 billion in global health R&D. These investments helped drive the development of 67 new technologies approved since 1999 for neglected and (non-COVID-19) emerging diseases. At the same time, they created 600,000 new US jobs and yielded knowledge expected to generate more than $255 billion in long-term benefits for the American economy—a six-fold return on investment. This exhibit showcased what’s possible when science, purpose, and smart policy align. Explore the exciting US-backed breakthroughs displayed below. VACCINESSingle-dose vaccines for Sudan and Marburg viruses on the rVSV vaccine platform IAVI, a nonprofit based in New York and New Jersey, is advancing single-dose vaccines for the Sudan and Marburg viruses using the proven rVSV vaccine platform, the same technology behind an Ebola vaccine that has helped contain recent outbreaks. Sudan and Marburg viruses continue to spark deadly, Ebola-like outbreaks, yet no approved vaccines or treatments exist, underscoring the urgency of this work. These vaccine candidates are being developed with critical support from the Defense Threat Reduction Agency at the US Department of Defense (DoD) and the Biomedical Advanced Research and Development Authority (BARDA). Novel oral polio type 2 (nOPV2) vaccine PATH, a nonprofit developer based in Washington state with an office in the District of Columbia, alongside the University of California, San Francisco; the Washington-based Gates Foundation; and global partners, developed nOPV2, a next-generation oral polio vaccine. nOPV2 maintains the same advantages of the original oral vaccine but has been specifically engineered to be less likely to seed vaccine-derived polio outbreaks in communities with low immunization coverage. This breakthrough, which is accelerating global efforts to end polio, also benefitted from critical development support from the US Centers for Disease Control and Prevention (CDC).Next-generation malaria vaccines PATH and the University of Oxford are developing next-generation malaria vaccines designed to overcome key limitations of the currently available options and help turn the tide of this longstanding global health challenge. This work has received vital US government support from the US Agency for International Development (USAID), the National Institute of Allergy and Infectious Diseases (NIAID) at the National Institutes of Health (NIH), and the DoD Walter Reed Army Institute of Research and Naval Medical Research Command. Additional US-based partners, including Johns Hopkins University in Maryland, the Scripps Research Institute in California, and the University of Texas at Austin, alongside a constellation of international collaborators, also played a critical role in advancing this research.DRUGSPretomanid, a novel tuberculosis (TB) drugTB Alliance, a New York-based nonprofit, developed pretomanid, a groundbreaking drug for treating highly drug-resistant TB. As part of a six-month combination regimen, it has drastically reduced treatment duration and complexity for patients compared to previous regimens that required up to 20 or more pills a day—as many as 14,000 total over the course of 18 months or more of treatment. This work was backed by US federal funding from USAID and NIAID and advanced in partnership with a broad coalition of American companies, nonprofits, and universities, including AbbVie Inc. in Illinois, Advancing Clinical Therapeutics Globally for HIV and Other Infections in the District of Columbia, the Gates Foundation, Harvard University in Massachusetts, Johns Hopkins University, Johnson & Johnson in New Jersey, RTI International in North Carolina, Texas A&M University, the University of Illinois Chicago, and the University of North Carolina at Chapel Hill.Child-friendly TB medicinesTB continues to infect millions of people worldwide each year, with children facing a heavy burden—an estimated 1.3 million new pediatric cases were reported in 2023. For decades, children with TB were treated with crushed adult pills, a practice that was difficult for caregivers and often led to inconsistent dosing. TB Alliance developed child-friendly TB medicines that are palatable, fast-dissolving in water, and precisely dosed for children, ensuring young patients finally have access to safe, appropriate, and easy-to-administer therapies. This work received vital funding from USAID and was advanced in partnership with other international donors and organizations, as well as US-based partners, including Management Sciences for Health in Virginia and Baylor College of Medicine in Texas.Inhaled oxytocin for the prevention and treatment of postpartum hemorrhage Postpartum hemorrhage, or excessive bleeding after childbirth, is the leading cause of maternal deaths globally. To address this urgent challenge, Monash University has developed an investigational heat-stable, inhaled powder formulation of oxytocin designed to provide the same protection as the injectable gold standard treatment. By eliminating the need for refrigeration and trained providers to administer injections, this innovation could greatly expand access to lifesaving care for mothers in low-resource settings. This work received funding from USAID and support from US-based partners, including the Gates Foundation and Johnson & Johnson, alongside other international collaborators. Monoclonal antibody therapy to prevent and treat Nipah virus (MBP1F5) The Coalition for Epidemic Preparedness Innovations, whose US headquarters are in the District of Columbia, is supporting the development of a monoclonal antibody therapy being advanced by California-based Servare GMP and Mapp Biopharmaceutical to prevent and treat Nipah virus, a highly lethal zoonotic disease with no approved treatments or vaccines. This work received support from the DoD Joint Program Executive Office for Chemical, Biological, Radiological and Nuclear Defense and Uniformed Services University, as well as USAID.Tafenoquine, a single-dose therapy for relapse prevention of P. vivax malaria & long-acting injectable malaria prophylaxisThe Medicines for Malaria Venture and GSK—whose US headquarters are in Pennsylvania— developed tafenoquine, a single-dose treatment to prevent the difficult-to-treat relapses characteristic of Plasmodium vivax malaria. By replacing multi-day regimens, tafenoquine simplifies care for patients and helps malaria-endemic countries accelerate progress toward elimination. Its development received crucial support from USAID, the DoD Walter Reed Army Institute of Research, and the US Food and Drug Administration through its Priority Review Voucher Program.The Medicines for Malaria Venture, Oregon Health & Science University, and the California-based Calibr-Skaggs Institute for Innovative Medicines are co-developing a long-acting injectable malaria prophylaxis designed to provide combination protection against both Plasmodium falciparum and blood-stage P. vivax malaria. This next-generation approach aims to offer durable, simplified prevention for people in high-risk areas. The work received important support from USAID and the Department of Veterans Affairs.Injectable lenacapavir for HIV prevention Gilead Sciences, a California-based biopharmaceutical company, developed lenacapavir, a groundbreaking new HIV prevention drug requiring twice-yearly injections. In pivotal Phase 3 trials, lenacapavir demonstrated remarkable efficacy across key populations, including historically underserved groups. Developed using evidence from NIH-funded research, it offers discreet, long-acting protection, providing an alternative to daily pills or bimonthly injections and making HIV prevention more accessible and easier to sustain.  DEVICESEllavi Uterine Balloon Tamponade for postpartum hemorrhage As noted earlier, postpartum hemorrhage is the leading cause of maternal deaths worldwide. The Ellavi Uterine Balloon Tamponade is a low-cost, easy-to-use inflatable device placed inside the uterus that uses pressure to rapidly slow or stop bleeding. Designed specifically for use in low-resource settings, it offers a simple, lifesaving intervention where advanced care is not always available. The device was developed by PATH and Sinapi Biomedical, with support from USAID, the Gates Foundation, and other partners.Anne® One continuous wireless vital sign monitoring platform Life-threatening pregnancy risks can too often go undetected in areas with limited resources and health care workforce. The Anne® One continuous, wireless vital-sign monitoring platform, developed by Illinois-based Sibel Health, Inc. and supported by the Gates Foundation and the Steele Foundation for Hope in New Hampshire, helps identify complications in real time, helping improve care for both mothers and babies. The technology can also enhance monitoring and care for patients of all ages, whether at home or in hospital settings. The work received key US government support from the Small Business Innovation Research program and the NIH RADx for Maternal Health Challenge, BARDA, and the DoD Medical Technology Enterprise Consortium.Monthly dapivirine vaginal ring for HIV prevention The dapivirine vaginal ring, originally developed by the Maryland-based International Partnership for Microbicides and now advanced by the Population Council in New York, is a flexible silicone ring that users self-insert, which reduces the risk of HIV infection. The ring provides one month of protection by slowly releasing the antiretroviral drug dapivirine, offering a discreet, user-controlled prevention option. Its development received critical support from NIH, USAID, the Gates Foundation, and other international donors and partners.Microarray needle-free “button” for vaccine and drug delivery Micron Biomedical, based in Georgia, developed a microarray needle-free “button” that could one day be used for delivering vaccines and pharmaceuticals without the need for traditional injections. This innovative, pain-free solution could be self-administered, reducing barriers to vaccination and treatment. It also limits or eliminates the need for refrigerated storage, simplifies transport and storage, and produces no sharps waste, making it especially valuable for low-resource settings. This technology received US funding support from CDC and BARDA (through the New York-based Global Health Investment Corporation) and was developed in partnership with other US-based groups, including the Gates Foundation, PATH, and Emory University in Georgia.Nifty Cup Millions of babies are born each year who are unable to breastfeed because they were born prematurely or have conditions such as cleft lip or palate. In low-resource settings, commonly used feeding tools can be impractical or difficult to keep hygienic. To address this challenge, PATH partnered with Washington-based collaborators, The University of Washington School of Dentistry and Seattle Children’s Hospital, with support from USAID and Laerdal Global Health, to develop the Nifty Cup. This low-cost silicone feeding cup is durable, gentle, easy to disinfect and simple for caregivers to use—a great example of a frugal, high-impact innovation designed specifically for low-resource environments.  HEATmarker™ vaccine vial monitor Most vaccines require continuous refrigeration to remain effective, which can be a significant challenge in remote and low-resource settings worldwide. Breaks in the cold chain can lead health workers to discard perfectly good vaccines because they suspect heat damage or, worse, unknowingly administer doses that have lost potency. To solve this, PATH and New Jersey-based Temptime (later acquired by Illinois-based Zebra Technologies) developed the vaccine vial monitor, a small sticker placed on vaccine vials that changes color when exposed to too much heat, clearly indicating whether a vaccine is still safe to use, preventing waste and saving lives. This simple, low-cost innovation reduces waste, improves safety, and helps ensure lifesaving vaccines reach the people who need them. The work received crucial support from USAID.BD Uniject™ auto-disable prefillable injection system Injectable drugs and vaccines have saved countless lives, yet administering them safely in low-resource settings presents challenges—health workers require appropriate training and if reused, syringes can spread dangerous infections. With funding from USAID, PATH designed the Uniject™ system, now manufactured by New Jersey-based BD. It’s an inexpensive, pre-measured and -filled syringe that automatically disables after a single use. This technology enables health workers with minimal training to safely deliver correctly dosed injections, prevents syringe reuse, reduces product waste, and ultimately saves lives and costs.BD SoloShot™ auto-disable syringeBD and PATH also partnered on the SoloShot™ auto-disable syringe, with support from USAID, which locks after injection, also helping prevent reuse and bloodborne disease transmission. Interceptor® G2 dual-insecticide bednetAs rising insecticide resistance threatens progress against mosquito-borne diseases such as malaria, Zika, and dengue, the Interceptor® G2 dual-insecticide treated bednet represents an important evolution of one of global health’s most essential prevention tools. Developed by BASF, whose agriculture division is based in North Carolina, the Interceptor® G2 uses two insecticides to improve effectiveness against resistant mosquito populations. Its development was supported by the President’s Malaria Initiative, USAID, and CDC, as well as the Gates Foundation, the Innovative Vector Control Consortium, and other international partners.  DIAGNOSTICSLumify AI-assisted handheld ultrasoundLife-threatening risks during pregnancy can go undetected in areas with limited health care resources, leading to deaths, as well as complications for both mothers and their babies. But a portable, artificial-intelligence-powered ultrasound developed by Philips Healthcare, whose North America offices are located in Massachusetts, with support from BARDA and the Gates Foundation, is addressing this challenge head on by helping improve access to screening for pregnant mothers in low-resource settings.Determine™ Antenatal Care Panel; Determine™ HIV Early Detect, Determine™ HBsAg 2, and Determine™ Syphilis TP rapid testsIllinois-based company Abbott developed a rapid panel test capable of simultaneously detecting HIV, hepatitis B virus, and syphilis, three major infections that pose serious risks to maternal and newborn health. The combination platform, which could simplify testing for health systems and patients and improve testing coverage, builds on individual in vitro rapid tests for each virus, which were developed by Abbott and later procured and scaled with support from the US President’s Emergency Plan for AIDS Relief (PEPFAR).OraQuick™ Ebola Rapid Antigen Test, Investigational Marburg rapid antigen test, and OraQuick™ HIV Self-TestOraSure Technologies, a Pennsylvania-based diagnostics company developed the OraQuick™ Ebola Rapid Antigen Test, a point-of-care tool that enables fast, presumptive diagnosis of Ebola virus disease. By providing results in minutes, the test supports health workers in rapidly isolating patients, initiating potentially lifesaving treatment, and ensuring safe and dignified burials that reduce transmission risk. The test was developed with support from BARDA.With support from BARDA, OraSure is also advancing a similar rapid antigen test for Marburg, a related virus to Ebola that also causes sever and often fatal disease.OraSure also has an oral HIV self-test, built on the same platform as its Ebola and Marburg tests. As the first US Food and Drug Administration-approved HIV self-test, it provides discreet, rapid testing for patients at home in as little as 20 minutes. The US government has supported scale-up of this product globally through PEPFAR.Co-Dx PCR Pro™ for on-site PCR testingThe PCR Pro™ molecular diagnostic platform from Utah-based Co-Diagnostics is designed to enable health care professionals to conduct on-site PCR testing, expanding access to fast, accurate testing outside traditional laboratory settings. With test panels available for flu, COVID-19, and RSV as a multiplex test and, separately, HPV and TB, the platform—developed with support from the NIH RADx program, as well as from PATH and the Gates Foundation for specific applications—has the potential to transform decentralized testing globally.NUTRITION INNOVATIONSReady-to-use therapeutic food for the treatment of severe acute malnutrition Nearly one third of children under five worldwide suffer from malnutrition. But a ready-to-use therapeutic food Plumpy’Nut has been a game changer. Developed by scientists at Washington University in St Louis and the French Institut de Recherche pour le Développement, manufactured by Georgia-based Mana and New Hampshire-based Edesia Nutrition, and scaled up with support from USAID and now the Department of State, this essential mix of vitamins, milk, and peanut butter allows severely malnourished children to recover and stay recovered with just a few servings.  Vitamin A biofortified corn Vitamin A deficiency is the leading cause of preventable child blindness worldwide. It impairs growth and immunity, increasing the risk of severe illness from common childhood infections such as diarrhea and measles. Corn biofortified with Vitamin A, developed by the District of Columbia-based Harvest Plus program at the International Food Policy Research institute, with support from USAID’s Feed the Future program, has been a transformative innovation. When consumed regularly, it can provide up to half of daily vitamin A needs for women of reproductive age and children. Thanks to our partners the American Society for Microbiology, the American Society of Tropical Medicine and Hygiene, Research!America, the Innovative Vector Control Consortium, IAVI, Monash University, Philips, Co-Diagnostics, HarvestPlus, Micron Biomedical, BASF, the Medicines for Malaria Venture, TB Alliance, Abbott, Mana, BD, Zebra Technologies, Sibel Health, the Coalition for Epidemic Preparedness Innovations, PATH, Gilead Sciences, OraSure Technologies, and the Global Health Investment Corporation for supporting this event.