Measles outbreaks surge to top 3,500 cases this year: These tracker maps show the areas hardest hit

The United States has reached an ignominious milestone this week. According to data from the International Vaccine Access Center at the Johns Hopkins Bloomberg School of Public Health, measles cases have now surpassed the 3,500 mark—a level not seen in 35 years. Here’s what you need to know about the multiple outbreaks affecting the country, and which areas are currently being hit the hardest. What’s happened? According to the Johns Hopkins Bloomberg School of Public Health, as of S...