Measles cases traced to refugees
A spike of measles infections in Berlin has been traced to unvaccinated refugees, but at least two cases appear to have come from the United States, authorities in the German capital said Friday. Berlin has recorded 347 cases of measles since the start of the year, more than twice the number it had during all of 2014. Officials believe the outbreak started with a child asylum seeker from Bosnia, because many subsequent infections among refugees were genetically linked. At least two cases have been linked to the U.S.