Measles, the most infectious microbe known to humanity, is making a comeback. On Monday, the Centers for Disease Control and Prevention updated its tally of measles infections for 2015 to a hundred and two. (Ninety-four of those are the result of an outbreak that began at Disneyland in mid-December.) There were more than six hundred measles infections in the U.S. in 2014, the highest total of any year since the disease was declared eliminated in this country a decade and a half ago.
It’s no mystery why this is occurring: increasingly, a dangerously high percentage of parents are choosing not to vaccinate against a disease that has killed more children than any other in history.