Breakthroughs Blog: Ebola

Interested in more global health innovation news? Every week GHTC scours media reports worldwide to deliver essential global health R&D news and content to your inbox. Sign up now to receive our weekly R&D News Roundup email. A clinical trial is launching to evaluate a new Ebola vaccine that could protect against multiple species of the virus. While effective vaccines against Ebola have been developed in recent years, they have been approved for only one of the four species of the Ebola virus—the Zaire species, which is responsible for many outbreaks and has the highest mortality rate. Researchers at the University of Oxford are now starting human trials of a new vaccine designed to protect against the Sudan species in addition to the Zaire species, which together have caused almost all of the Ebola outbreaks and deaths. The vaccine is based on the same underlying technology used for the Oxford-AstraZeneca COVID-19 vaccine.Regeneron’s antibody cocktail reduced the risk of COVID-19 infection by 81.6 percent over a period of two to eight months, according to phase 3 trial results announced last week. Previously reported results from the trial had shown REGEN-COV to reduce risk of infection during the first month after administration; the new results demonstrate potential for the drug to provide more long-lasting preventive immunity, which could be an important tool for those who do not respond to COVID-19 vaccines, including people who are immunocompromised. The antibody cocktail is currently authorized in the United States and European Union to treat non-hospitalized patients who are already infected and at high risk of severe illness and in certain cases as a post-exposure prophylaxis.GlaxoSmithKline (GSK) and Vir Biotechnology announced on Friday that their COVID-19 antibody treatment, sotrovimab, works as well when given as a shot in the arm as when administered via standard infusion. Intramuscular injection could offer additional convenience for delivery of the treatment, as it can be performed by family doctors in non-hospital settings. Sotrovimab is authorized for emergency use in the United States to mitigate progression of mild and moderate cases of COVID-19, and the European Medicines Agency has greenlit its use by member states, though EU-wide approval is still outstanding. GSK plans to speak to global regulators, including the US Food and Drug Administration, about approval for the new method of administration.

Interested in more global health innovation news? Every week GHTC scours media reports worldwide to deliver essential global health R&D news and content to your inbox. Sign-up now to receive our weekly R&D News Roundup email.Last Wednesday, the United Kingdom authorized AstraZeneca and the University of Oxford’s COVID-19 vaccine, giving the candidate its first regulatory greenlight and providing the country with its second vaccination option. The two-dose AstraZeneca/Oxford vaccine—of which a two-dose, full-strength regimen showed 62 percent efficacy in clinical trials—is low cost and easy to handle, as it can be stored in refrigerators rather than ultra-cold or freezer temperatures that other vaccines require. The United Kingdom has also updated its distribution strategy and will allocate the first vaccine dose of both vaccines to as many people as possible before circling back within 12 weeks, rather than 3, to provide the second dose, instead of holding large amounts in reserve for the second shot. By providing more people with quicker access to the first dose, the hope is to enable the greatest number of eligible people to receive some level of protection in the shortest time possible. Rollout of the AstraZeneca/Oxford vaccine in the United Kingdom begins today.The World Health Organization (WHO) on Thursday issued an emergency use validation for Pfizer and BioNTech’s COVID-19 vaccine, the first COVID-19 vaccine authorization the agency has made. The emergency validation allows some countries to expedite their own regulatory approval processes for the candidate, as well as allows UNICEF and the Pan-American Health Organization to acquire and deliver the vaccine to countries in need. In its statement, WHO also emphasized the need for equitable global access to COVID-19 vaccines and urged a global effort to ensure enough vaccine supply for priority populations around the world. The two-dose Pfizer/BioNTech vaccine, which was shown to have 95 percent efficacy in clinical trials, requires a strict cold chain that could pose a challenge to distribution in many countries.The US Food and Drug Administration (FDA) has approved Ridgeback Biotherapeutics’ Ebanga drug to treat Ebola. The endorsement makes Ebanga the second FDA-approved Ebola therapeutic, following approval of Regeneron’s Inmazeb in October. The two treatments, both antibody therapies, were tested in a trial conducted during the 2018-19 Ebola outbreak in Democratic Republic of the Congo against standard-of-care therapies Zmapp and remdesivir for the control arm. Trial data indicated patients who received Ebanga were more likely to survive than those in the control group. Among those receiving the treatment, 35.1 percent died compared to 49.4 percent in the control group. The 11th and most recent Ebola outbreak in the Democratic Republic of the Congo was identified in June and declared over in mid-November.

Interested in more global health innovation news? Every week GHTC scours media reports worldwide to deliver essential global health R&D news and content to your inbox. Sign-up now to receive our weekly R&D News Roundup email.Clinical trials for Johnson & Johnson’s (J&J) COVID-19 vaccine candidate and Eli Lilly’s COVID-19 monoclonal antibody treatment were paused last week, while the US arm of AstraZeneca’s COVID-19 vaccine trial remains on hold since a patient’s potential adverse reaction in September. Vaccine experts say these pauses should be reassuring, not frightening, as they indicate the trial process is functioning as it is designed to; a clinical trial with no reports of adverse events would be unusual. J&J announced its trial pause after an “unexplained illness” in a trial participant, and the company will be reviewing the case along with an independent data monitoring board before making a decision on whether to resume the trial. Eli Lilly’s trial pause came after a potential safety concern flagged by an independent review board, and the board will review the data again at a later date to make a decision on its continuation.Pfizer announced last week it has received approval from the US Food and Drug Administration (FDA) to expand its COVID-19 vaccine trial to include children ages 12 and up. This development will look to understand vaccine safety and efficacy among adolescents and will mark the first inclusion of children under 16 in a COVID-19 vaccine trial in the United States. More than half a million children have been infected with COVID-19 this year, and more than two-thirds of the children who died were Black or Latinx, according to Sara Gozer, president of the American Academy of Pediatricians. While vaccine trials began with a focus on older participants due to their higher risk for more serious illness, pediatricians have emphasized the importance of not leaving children behind as trials progress.FDA has approved Inmazeb, an antibody cocktail made by Regeneron, for use as an Ebola therapeutic. This is the first FDA approval for a treatment specific to Ebola, and means there is now an FDA-approved treatment and vaccine for the virus. The treatment, which has been used during the current Ebola outbreak in the Democratic Republic of the Congo (DRC) under compassionate use protocol, was shown to be effective during a clinical trial conducted during the 2018–2020 outbreak in eastern DRC. The Biomedical Advanced Research and Development Authority has purchased an undisclosed number of Inmazeb doses for the US strategic stockpile, and Regeneron has said it will work to ensure low-income countries will also have access to the treatment.

Interested in more global health innovation news? Every week GHTC scours media reports worldwide to deliver essential global health R&D news and content to your inbox. Sign-up now to receive our weekly R&D News Roundup email.  Five African countries have become the first to license Merck’s highly effective Ebola vaccine, rVSV-ZEBOV-GP. This means the vaccine can now be administered in those countries—including the Democratic Republic of the Congo (DRC), Burundi, Ghana, Zambia, and Guinea— without being subject to clinical trial or research protocols. Three months ago, the World Health Organization (WHO) prequalified rVSV-ZEBOV-GP when it announced that the vaccine met quality, safety, and efficiency standards—paving the way for African countries to start their own regulatory processes. rVSV-ZEBOV-GP was first used in the 2015 Ebola outbreak and later in the current ongoing outbreak under a “compassionate use” research protocol, where it was found to be more than 97 percent effective. Last week, Sanofi Pasteur announced it would partner with the US Biomedical Advanced Research and Development Authority (BARDA) to develop a vaccine for the novel coronavirus, COVID-19. Sanofi’s previous work to develop a vaccine for SARS, another coronavirus, could give the company a head start on other drug-makers racing to develop a vaccine against COVID-19. With BARDA funding, Sanofi plans to develop a bank of vaccine candidates and produce pilot lots for testing. No decisions have been made about later-stage funding. Sanofi expects to have a vaccine candidate to test in the lab within six months, which could be ready for human trials within a year to 18 months. Sanofi is the second major vaccine maker, along with Janssen (Johnson & Johnson), to announce it will try to develop a vaccine against COVID-19, which has reportedly infected more than 70,000 people, mostly in China. Other small biotechs are also working on candidates. The Zambia National Public Health Institute and FIND have launched a new platform that enables data-driven decision-making to tackle antimicrobial resistance (AMR). The platform, Zambia One Health Surveillance System, captures reliable AMR data from across sectors, including human and animal health, in a unified and harmonized data management system. Prior to this platform, Zambia lacked a systematic approach for the collection, collation, and analysis of AMR data to inform an effective response to the rising threat of AMR. According to WHO, AMR is a global public threat that could lead to over ten million deaths per year by 2050.