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.

Dropping vaccination rates and changes in U.S. vaccine policy have public health experts concerned that annual measles outbreaks could become more frequent.

There have been more measles cases in the US this year than any other since the disease was declared eliminated a quarter-century ago.

Faced with a skeptical religious community that became the center of the outbreak, public health officials say they may have ...

Health officials in Colorado say its measles outbreak is over. The U.S. added 10 new cases this week for a total of 1,319. States with active outbreaks include Arizona, Georgia, Iowa, Kansas ...

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, according ...

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, ...