Preventative Ebola Vaccination for High-Risk Countries Backed by Gavi and WHO
A stockpile of half a million Ebola vaccine doses was established by Gavi and other global health partners in 2019 for use in outbreaks of hemorrhagic fever, which has an average fatality rate of roughly 60%. Around 11,000 people died in a 2014-16 outbreak in West Africa, the largest ever.
But while highly deadly, Ebola outbreaks are relatively rare. Around 208,000 doses of the stockpiled Ervebo vaccine, made by Merck, were set to expire this year if unused, although some countries have already had doses shipped to them for preventative campaigns, including the Democratic Republic of Congo and Uganda. Now there are around 120,000 doses close to expiry.
Gavi said it will fund preventative use of Ervebo routinely for high-risk countries, including transport and vaccination costs, after the World Health Organization (WHO) last month recommended using it this way. The vaccines are also still available for use in outbreaks.
Ebola vaccine
The WHO also backed preventative use for high-risk groups of the other Ebola vaccine, Zabdeno, made by Johnson & Johnson, with a booster dose, Mvabea, created by Bavarian Nordic. This vaccine is not currently held in the stockpile. Both vaccines target the Ebola Zaire strain of the virus, rather than the Sudan strain that caused an outbreak in Uganda in 2022.
Gavi chief executive Sania Nishtar said the stockpile had already helped cut down Ebola cases and deaths during outbreaks and could now protect those at the highest risk from this “terrible disease that can lay waste to whole communities”.
Gavi also said it would support lower-income countries to add other vaccines to their routine programs.
These included introducing a dose of the hepatitis B vaccine at birth, a new vaccine protecting against five strains of meningococcal meningitis, and using the rabies vaccine for protection post-exposure. The plans, including for preventative Ebola vaccination, were all signed off by Gavi’s board before COVID-19 but delayed by the pandemic and other factors.
