Some people in Rockland County may have been exposed to the measles.

Officials from the Rockland County Health Department officials say a traveler from Israel with measles visited at least three venues in New Square from Sept. 28 to Oct. 1.

A letter was sent out to the Hassidic community in New Square alerting people to the potential measles exposure.

According to health officials, a patient confirmed with the disease was treated at the Refuah Health Center in Spring Valley. He also visited Bais Medrash, which is the congregation of New Square, and attended a Sukkah celebration near Avir Yakov Boys School.

The Refuah Health Center is now offering immunizations at all its locations.

Measles can cause serious complications like pneumonia and swelling of the brain. This is especially true for anyone with a weakened immune system. Symptoms may develop as late as Oct. 19. Symptoms include rash, high fever, cough, runny nose and red, watery eyes.

Anyone who thinks that they were exposed and displaying symptoms should contact their doctor or a hospital before leaving their home. This will prevent possible exposure to others.

News 12 is told the person traveled through Newark Liberty Airport and the New Jersey Department of Health is looking to identify people who may have been exposed there.