DRC trial tests Ebola vaccine against Bundibugyo virus; first 4 vaccinated

The WHO and researchers have begun a clinical trial in the DRC to assess whether the existing Ebola vaccine protects against the Bundibugyo virus, a related but distinct species. Initial results are months away, so efficacy remains unproven. This matters because a positive outcome would expand the available countermeasures for a neglected Ebola strain in a region with recurrent outbreaks.

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