Sonora continues to have the second-highest number of measles cases of all of Mexico’s states, after only its neighboring ...

Health officials in Navajo County in northern Arizona say they've confirmed four measles cases, which are the first cases of ...

Health officials in Arizona say there are four linked measles cases in Navajo County, marking the state's first outbreak this ...

As super-contagious measles continues to spread and nears a six-year U.S. record, cases in its original epicenter of West ...

The four cases were confirmed in Navajo County. All four cases were people who were not immunized and had recently traveled ...

The biggest American measles outbreak in years has finally hit Arizona. On Monday, four cases of measles were confirmed in Navajo County. The cases are the first of the infectious disease that ...

Waning immunization rates mean Arizona schoolchildren are more vulnerable to vaccine-preventable diseases such as whooping ...

Infectious disease experts are working to find people who may have been exposed to the measles after four cases were ...