New Ebola Outbreak Defies the Vaccine That Worked Before

The virus spreading in the Democratic Republic of Congo this year is a type called Bundibugyo. The vaccine that stopped the last big Ebola outbreak doesn't work on it. Doctors have been using vaccine shots to stop outbreaks by protecting people around infected patients—a strategy that worked. Now they can't use that approach. Without it, they rely on protective suits, finding cases quickly, and isolation in a region torn by decades of war.