Its been fifty years since the United States approved a vaccine to prevent measles — and more than a decade since the disease was declared eliminated in the country. But now, the rate of measles is once again on the rise: a new report from the US Centers for Disease Control and Prevention (CDC) has concluded that 2013 saw measles infections increase to three times the typical number. A total of 175 confirmed measles cases have been diagnosed so far this year, most of them clustered in one of nine outbreaks that occurred across the country. its the failure to vaccinate, Thomas Frieden, the CDCs director, told reporters at a press conference earlier today.