NEW YORK CITY - The New York City Health Department warning residents in Washington Heights and the Bronx area about a measles outbreak.
Officials saying 16 have caught the highly contagious infection.
They say it all started with one case. Dr. Jay Varma, with the health department said, "An adult came to New York City and had measles.
They inadvertently spread it to other people. Some people may have gotten it by passing this person on the street or in a restaurant somewhere."
Seven adults and nine children have been infected with measles.
Measles symptoms include a rash, high fever, cough, red eyes and runny nose lasting 5 to 6 days.
However, experts say you're contagious 4 days before developing the rash and for 4 days after.
Measles can also be deadly in some cases.