A measles investigation amid a large, ongoing outbreak at the Arizona-Utah border has hit a roadblock as the first probable ...

The second-largest measles outbreak in the U.S. this year continues to expand, with 13 new cases confirmed this week.

A measles outbreak in parts of Utah and Arizona not far from Las Vegas has grown to over 130 cases, according to public health officials in both states.

An outbreak of measles at the Arizona-Utah border has grown to 123 cases and seven hospitalizations, new data shows.

Just as one large measles outbreak peters out in the United States, another outbreak of the virus has taken off along the ...

A measles outbreak along the Utah-Arizona border has spread to nearby communities and reached a total 123 confirmed cases, ...

A deadly measles outbreak in Texas ended in August, but outbreaks in other parts of the United States continue to add ...

The outbreak, centered in the former polygamist Mormon area of Short Creek, is the state's biggest in decades.

One Washington County town and its neighboring Arizona town have the country's second-largest measles outbreak this year.

Over 100 measles cases surge in Utah and Arizona as declining vaccination rates and exemptions spark concerns over the return ...

In Utah, there are 44 cases in the southwest part of the state, followed by seven cases in Utah County, three cases in ...

Measles outbreaks have spread across the U.S. to reach 41 states. The largest ongoing cluster in Utah and Arizona has now grown into the second-biggest outbreak of the year. Utah reported a total of ...