North America has three other large outbreaks. The longest, in Ontario, Canada, has resulted in 2,276 cases from mid-October ...

Measles is highly contagious. It can lead to serious health problems. But it is preventable by the MMR vaccine.

Health officials in Illinois and North Dakota say their states' measles outbreaks are over, pointing to a continuing slowdown ...

Health officials in Colorado say the state’s measles outbreak is over, and the U.S. added just 10 confirmed cases nationally in the last week. Wednesday’s national case count stood at 1,319 ...

Health officials in Colorado say the state's measles outbreak is over, and the U.S. added just 10 confirmed cases nationally in the last week. Wednesday's national case count stood at 1,319, ...