NEW YORK (CBSNewYork) — There have been three more cases of measles confirmed in New York City. The new cases bring the number of people who have come down with the disease since January to 13.

On Wednesday, the city’s Department of Health sent out an alert to doctors, warning them to be on the lookout for additional cases.

1010 WINS’ Alice Stockton-Rossini reports: Three More Cases Of Measles In New York

The three latest cases include two adults and an 8-month-old child.

None of those individuals have recently traveled abroad, which officials said means the virus is now spreading from person to person.

According to the Mayo Clinic’s website, symptoms of measles include fever, dry cough, inflamed eyes, tiny white spots with bluish-white centers found in the mouth and a skin rash made up of large, flat blotches.