A vaccine candidate that has now advanced into a Phase 2 trial could offer a new tool for preventing invasive nontyphoidal Salmonella and typhoid fever, life-threatening bacterial infections that disproportionately affect young children in low- and middle-income countries. There are currently no licensed vaccines against invasive nontyphoidal Salmonella. GSK’s vaccine candidate, which was supported by the Combating Antibiotic-Resistant Bacteria Biopharmaceutical Accelerator (CARB-X) through preclinical and Phase 1 development, combines a new vaccine formulation for invasive nontyphoidal Salmonella with an existing typhoid conjugate vaccine. The trial, funded by Wellcome, marks the first time a CARB-X-supported vaccine candidate has reached Phase 2 development.
An independent expert group convened by the World Health Organization has recommended that two Ebola vaccine candidates join an ongoing clinical trial in the Democratic Republic of the Congo amid the country’s ongoing outbreak of the Bundibugyo strain of Ebola, for which there are no specific vaccines. Based on evidence from preclinical and early clinical studies, the University of Oxford and the Serum Institute of India’s ChAdOx1 and Moderna’s mRNA-1469 candidates will be added to the trial, pending national approval. The trial is designed to test multiple vaccine candidates concurrently, prioritizing contacts of people with confirmed disease, with Ervebo, a vaccine currently approved for the more common Zaire strain of Ebola virus, already being evaluated for potential efficacy against Bundibugyo. Initial findings are expected within months, with results expected early next year.
Last week, a trial of the first-ever long-acting injectable for malaria prevention launched in Rwanda. MMV371, developed by Medicines for Malaria Venture (MMV) in partnership with Quotient, has been shown to provide protection for around three months and could be a critical new weapon in the fight against malaria alongside vector control, vaccines, and preventive medicines. Climate change-induced changes in mosquito range and rising antimicrobial resistance have complicated malaria control efforts, and current malaria vaccines are only for very young children and require four doses. A long-acting injectable like MMV371 could offer a complementary long-acting prevention option for the broader population, including older children, adolescents, adults, and pregnant women. The developers are working to make the injection affordable in malaria-endemic countries and are also advancing a second-generation injectable that could provide year-long protection.