A Long Island baby tested positive for measles as health officials issued an ominous warning Wednesday that at least 12 more people may have been exposed to the virus. The child, who is under a year old,

At least 12 people were potentially exposed to measles on Long Island after a baby too young to be vaccinated tested positive at a medical facility, public health officials said Wednesday.

Officials on Long Island are warning parents about potential measles exposure after a child in Suffolk County tested positive for the virus this week.

Cohen Children’s Medical Center, located near the border of Queens and Long Island, has identified 12 Suffolk County residents who could have been exposed to measles at the hospital between March 3 and 6.