Breakthroughs Blog: COVID-19

On Thursday, the World Health Organization (WHO) announced the first patient enrollment in a critical clinical trial evaluating investigational antiviral therapies to treat Ebola caused by the Bundibugyo virus, as the worrying outbreak in the Democratic Republic of the Congo continues to grow. There are currently no approved treatments specifically for the Bundibugyo strain. The trial is supported by a range of multilateral, regional, national, and scientific partners and is being coordinated by the Institut National de Recherche Biomédicale, the Institute of Tropical Medicine and the University of Oxford. Two therapies, the monoclonal antibody MBP134 and remdesivir, which were selected by WHO technical advisors, are being evaluated for their ability to improve survival among patients, with the goal of saving lives and helping curb the spread of the current outbreak, as well as generating evidence to improve care for future outbreaks. A comprehensive review of COVID-19 mRNA vaccines published last week in The Lancet found that they are safe and effective, as skepticism around the safety and trustworthiness of the technology has persisted in recent years, while new research efforts have demonstrated the technology’s promise to address a range of priority disease and health challenges, including influenza and cancer. The researchers found that serious events are rare and the odds of them occurring were outweighed by significant protection against severe disease, hospitalization, and death. The researchers do acknowledge challenges with mRNA technology, including that they mRNA vaccines are not as effective at providing long-last immunity as they are at generating short-term responses and they have significant, expensive storage resource requirements, challenging access in low-resource areas. Sustained innovation and a commitment to improving access could help address these shortcomings and ensure the promise of mRNA technology is fully realized around the world.Early results from a new study published in Nature last week found that an investigational HIV vaccine demonstrated unprecedented success in primates in a preclinical trial. The vaccine, which was developed through a prolonged collaboration between scientists at La Jolla Institute for Immunology and Scripps Research, works by prompting the immune system to produce high numbers of broadly neutralizing antibodies, which are capable of neutralizing a wide range of strains of the virus and are recognized as a promising approach in the HIV vaccine development field. One of the challenges of developing a vaccine for HIV has been the genetic diversity of the virus, with various distinct strains circulating. People living with HIV naturally develop broadly neutralizing antibodies that can neutralize various strains but designing a vaccine that can induce them has proven to be a challenge for researchers. 

A recent article explores how artificial intelligence (AI) could revolutionize the development of RNA drugs, which have emerged as a promising tool across health areas, from oncology to preventive vaccines. RNA-based therapies have demonstrated higher success rates than traditional pharmaceuticals and are associated with lower costs and much quicker drug discovery timelines. AI could help address current limitations of the technology by enabling faster and more accurate RNA target identification and expediting the testing of promising drug candidates, also leading to cost savings.  The World Health Organization (WHO) recently announced the prequalification of two rapid antigen tests for SARS-CoV-2, the virus that causes COVID-19, helping improve diagnostics access worldwide as the virus continues to circulate globally. The SD Biosensor Standard Q COVID-19 Ag Test and the Acon Biotech Flowflex SARS-CoV-2 Antigen Rapid Test were previously listed under the WHO’s emergency use listing. Their new designation makes them the first rapid antigen tests for SARS-CoV-2 to achieve WHO prequalification. This decision makes them eligible for procurement by United Nations agencies, global health partners, and other international stakeholders, helping ensure access to rapid, reliable diagnostic testing in low- and middle-income countries. A research team has used an innovative robotic system to develop a possible antibiotic candidate for priority bacterial threats, as the global danger of antimicrobial resistance continues to rise. Specifically, the researchers used the technology to rapidly screen more than 700 complex compounds in just one week, identifying a promising antibiotic candidate that demonstrated high effectiveness against bacteria, including strains similar to the deadly MRSA, while remaining non-toxic to human cells, suggesting it is a strong candidate for further drug development. The new process, which utilizes robotics and “click” chemistry, shows potential as a new method to expedite the typically slow drug discovery process. 

A systematic review and meta-analysis of studies looking at the effectiveness of typhoid conjugate vaccines found that they are highly effective in preventing typhoid fever in countries where the infection is endemic, adding to the collection of real-world evidence supporting their use. Despite the high burden of typhoid fever—an infection caused by Salmonella enterica serovar Typhi—in Africa and Asia, only ten countries to date have added the vaccines to their national immunization programs. There are three vaccines for preventing typhoid fever that are currently recommended and licensed by the World Health Organization. Last week, California-based True Diagnostics announced that it had received an award of upward of $11 million from the Biomedical Advanced Research and Development Authority (BARDA) to support the development of a blood-based rapid antigen test for Ebola and Marburg viruses. The test, if it proves effective, could help boost testing capacity and national preparedness for outbreaks of pathogens with pandemic potential like Ebola and Marburg viruses, which have caused worrying outbreaks in Africa in recent years. Specifically, the funding will support the further development, validation testing, and regulatory submissions of its VeriClear EbV MARV Rapid Antigen Test to detect and differentiate Ebola and Marburg viruses in fingerstick blood samples.   A research team presented new data at the 2025 European Society for Medical Oncology Congress in Berlin, Germany last week, showing that cancer patients who received COVID-19 mRNA vaccines within 100 days of starting immunotherapy drugs survived more often than non-vaccinated patients. These findings suggest that mRNA vaccines could help improve outcomes for cancer patients being treated with immunotherapies and even patients with treatment-resistant cancers. While these results are preliminary and need to be confirmed in an upcoming Phase 3 randomized clinical trial, scientists say they could revolutionize cancer care, perhaps even paving the way for a universal, off-the-shelf vaccine for cancer. 

Last Wednesday, Emergent BioSolutions announced that it has received a $56 million contract extension with the Administration for Strategic Preparedness and Response to supply the US government with doses of a combined smallpox/mpox vaccine. The single-dose vaccine was first approved by the US Food and Drug Administration in 2007 for smallpox and, since 2024, has been one of two approved vaccines for smallpox and mpox. The vaccine doses, which will be stored in the Strategic National Stockpile, aim to boost US preparedness for future public health emergencies. A novel breakthrough method that utilizes artificial intelligence and advanced imaging technologies to more accurately and efficiently identify therapeutic antibodies could transform the way researchers develop treatments for infectious diseases, particularly emerging diseases, by significantly accelerating research. The method reduces the time needed to identify antibodies with potential from weeks to under a day and can also accomplish this task more efficiently, requiring far fewer researchers dedicating their time to screening thousands of candidate antibodies. This could allow researchers to move on from antibody discovery to the later stages of drug and vaccine development earlier and, ultimately, bring lifesaving products to patients faster. A recently published study found promising results for a new approach to developing broad-spectrum antivirals to treat existing viral infections and maybe even to prevent infections from emerging viral threats. Broad-spectrum antivirals are treatments that could combat a wide range of viruses by hitting essential targets that are common across many different viruses. While there are broad-spectrum treatments for bacterial infections, there has not been a similar broad-spectrum antiviral treatment approved for human use, in part because the proteins on the surface of a virus vary widely and change rapidly over time. The researchers focused on small molecules called synthetic carbohydrate receptors (SRCs), which earlier studies have suggested could be a potential target for antiviral medicines. They tested 57 different SRCs against six deadly viruses from three different viral families, including the viruses behind COVID-19, MERS, Nipah, and Ebola, finding several promising SRCs that blocked cells in the lab from being affected by all the viruses, some of which also later demonstrated promising safety and efficacy results in mice.