A California child died last year of SSPE, a measles complication that likely will become more common as U.S. measles cases increase.

Before the advent of widespread and effective vaccines, the complication occurred enough in the U.S. that, in the 1960s, a doctor created a national registry of SSPE patients. Researchers now estimate ...

Measles causes complications — ranging from diarrhea to death — in 3 in 10 infected people, according to the Infectious Diseases Society of America. Some are immediate, while others take weeks or ...