BERLIN, GERMANY - FEBRUARY 26: Vials of Priorix children's vaccine, which combats mealses, mumps, rubella and chicken pox, stand on February 26, 2015 in Berlin, Germany. The city of Berlin is facing an outbreak of measles that in recent weeks has led to over 700 cases and one confirmed death of a little boy who had not been vaccinated. Vaccination in Germany is not compulsory by law though the vast majority of parents have their children vaccinated. (Photo by Sean Gallup/Getty Images)
