The Maricopa County Department of Public Health has confirmed three related cases of measles.

One case is an adult, and the other two are in minors. One case was hospitalized. All three are unvaccinated, and they are all recovering, officials said.

The department is conducting case investigations and contact tracing on all three cases.

“We are working diligently with the cases and their healthcare providers to identify any potential exposures and notify people who were exposed promptly,” said Dr. Nick Staab, medical epidemiologist at the health department. “The most important thing you can do to protect yourself is to get vaccinated against measles if you have not already been vaccinated.”

Measles can linger in the air for up to two hours, and approximately 90% of unvaccinated individuals who are exposed to measles will become infected, according to a county release.

It is preventable with two doses of the measles, mumps, and rubella vaccine, typically given during childhood. Adults need at least one dose of MMR vaccine given after the age of 1. Individuals born before 1957 or who had measles as a child are considered immune.

Anyone who may have been exposed should watch for symptoms, which appear typically seven to 12 days after exposure but may take up to 21 days. Symptoms include:

• Fever (101 degrees or higher)
• Red, watery eyes
• Cough
• Runny nose
• A non-itchy rash that is red, raised, and blotchy. The rash begins after other symptoms, usually on the face at the hairline, and moves down the body. The rash may last five to six days.

Individuals who develop symptoms are encouraged to seek medical care and testing and avoid others.