US Measles Cases Highest Since 2001

Measles, once nearly eradicated in the US, appears to be regaining a foothold. The CDC reports at least four outbreaks under way, with at least 64 cases in nine states—the most since 2001. The new cases probably originated in other countries and incubated in pockets of non-immunized US children, the Washington Post reports. If people continue to shun vaccines, large-scale outbreaks are possible, the CDC says.

"I am concerned. This is different from what we have been seeing in the last few years," said the CDC director. (More disease stories.)