DRC's Fastest-Spreading Ebola Outbreak Has No Vaccine to Stop It

The DRC's latest Ebola outbreak is its fastest-spreading ever, says the UN. It's caused by a strain with no approved vaccine. Past outbreaks used a vaccine to protect each patient's contacts, but here the only tools are isolating the sick, tracing who they met, and supportive care. With 5,794 cases and 2,786 deaths across six provinces, that gap hurts.