Stories

Ebola vaccine shows long-term protection over 2 years

A nurse administers an Ebola vaccine in Monrovia, Liberia on February 2, 2015 as part of a clinical research study conducted by the National Institutes of Health and the Liberian Ministry of Health.
A nurse administers an Ebola vaccine in Monrovia, Liberia, as part of a 2015 clinical research study. Photo: John Moore/Getty Images

An Ebola vaccine made by Merck has protected a group of volunteers for two years — the longest it has been shown to protect against the disease, according to a study published in Lancet Infectious Diseases.

The context: "A fast-acting, long-lasting vaccine given in a single dose would be an effective tool for controlling dangerous Ebola outbreaks," STAT's Helen Branswell reports.