The Suffolk Health commissioner confirms the first case of measles this year on Long Island is a baby under the age of one, and 12 other people are potentially exposed.

"Definitely concerning, since we go to a lot of parks and other places that we're around other children," said Christina Benoit, of Islip.

A day after the state confirms a case of the measles in a Suffolk child under the age of one, the Suffolk County Health commissioner says 12 other Suffolk residents are potentially exposed to measles, including another infant.

But Suffolk County Health Commissioner Dr. Gregson Pigott says he is not concerned this will become an outbreak.

"We have enough immunity in the population it should not spread," said Pigott.

As News 12 first reported, the baby was at Cohen's Children's Hospital while being treated.

"This is an infant who is not eligible for vaccination," said Pigott.

Officials have not said where exactly in Suffolk, but contact tracing and monitoring for the 12 people are underway.

News 12 is told 82% of Suffolk and Nassau residents are vaccinated against the measles.

The Suffolk County Health commissioner says they don't have many details, but they believe the infant caught the measles while the family was traveling.

Some say they're still worried about the possible spread of measles.

"I have an 8-month-old grandchild and definitely we're watching her vaccinations and that's one we're definitely getting," said Joan Larock, of Islip.

The Suffolk Health commissioner says there have been no further cases of measles on Long Island identified since the initial case. He says the infant with measles has been discharged and sent home from the hospital.

Health experts say even one measles-mumps-rubella shot is 93% effective at preventing measles transmission.

You can get a blood test called "titers" to check your immunity to the measles.