Mealses, mumps, polio, rubella, whooping cough… All diseases that are eminently preventable by vaccination. But, as this data visualization shows, while their incidence has decreased by 57 percent around the world between 2008 and 2014, in the U.S. it’s soared by 6,000 percent. There is, of course, one very compelling reason why whooping cough became an epidemic in California and measles hit New York hard—and that is anti-vaxxers. The mistaken belief that vaccines are bad is causing swathes of perfectly avoidable illness. We should change that.