A Nassau County resident has been confirmed to have the third measles cases in the state this year, according to the New York State Department of Health (NYSDOH).

The NYSDOH says this case of measles is the first in the state outside of New York City.

The department says it is working with Nassau County health officials and have alerted the Centers for Disease Control and Prevention.

“Our epidemiologists and Department staff with the Divisions of Vaccine Excellence (DOVE) and Epidemiology are working hand in hand with our experts in the Wadsworth Laboratory as well as Nassau County health officials to monitor and investigate this case and any potential exposures,” State Health Commissioner Dr. James McDonald said. “The most important thing people can do to protect themselves is to verify they’ve been properly immunized against measles and immediately get a shot if they are not.”