European tourists exposed the Hudson Valley to a serious respiratory disease that's considered very contagious.

Health officials from New York State confirmed that two tourists with measles from Europe visited Putnam and Orange counties last week, ABC reports.

The pair were at the World Headquarters of Jehovah's Witnesses in Tuxedo Park on Monday and Watchtower Educational Center on Tuesday. The pair were in Brooklyn Sunday.

According to the New York State Department of Health, measles is a serious respiratory disease that causes a rash and fever.

"It is very contagious. You can catch it just by being in a room where someone with measles coughed or sneezed,"  New York State Department of Health wrote on its website.

Symptom usually starts 10 to 12 days after a person is exposed. Symptoms include a fever, cough, runny nose and red watery eyes.

A rash may appear two to four days after the fever and last five to six days, according to the New York State Department of Health.

If you think you may have been affected or experience symptoms you should call your doctor.

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