Four measles cases have been confirmed in unvaccinated individuals in Navajo County, Arizona, after international travel exposure.

Arizona has been working for herd immunity of 95% against the measles virus. In Navajo County, it’s only at 80%, and Pima County is at 93%. For some reservations across the state, it’s even lower.

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

Arizona health officials say there are four confirmed linked measles cases, making it another state with an outbreak.

Arizona health officials reported the state’s first measles cases of the year, four Navajo County individuals who were not ...

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

The four cases involve people who were not vaccinated against measles, health officials say. Three or more related cases are considered an active outbreak.

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

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

Measles -- declared eliminated in the U.S. in 2002 thanks to widespread vaccination -- has hit at least 22 states this year. Arizona hasn’t reported a single case during the current outbreak ...

The Texas measles outbreak has grown by six cases since the ... Jamie previously reported for The Arizona Republic and Arizona PBS.