The Nassau County Department of Health announced on May 4 that a laboratory-confirmed case of measles has been identified in an unvaccinated child under five years old. This marks the first reported case of measles in Nassau County since 2024, according to health officials.
The department said it is working with the New York State Department of Health to investigate the situation and prevent further spread. The matter is considered serious because measles can cause complications such as pneumonia, encephalitis, hospitalization, and sometimes death.
“The Nassau County Department of Health is closely investigating the case, including any potential exposures, and taking the necessary steps to prevent the spread of measles,” said Dr. Irina Gelman, health commissioner. “Measles can cause serious illness, with complications that may include pneumonia, encephalitis, and often results in hospitalization and sometimes death. We strongly encourage residents to protect themselves and their families by making sure they are up to date on important, lifesaving immunizations.”
Measles is described as a highly contagious respiratory virus that spreads through airborne droplets when an infected person coughs or sneezes. It can also be transmitted by touching contaminated surfaces followed by contact with one’s eyes, nose or mouth. Symptoms include fever, cough, runny nose and watery eyes followed by a rash; these typically appear between seven to twenty-one days after exposure.
Officials advise anyone who may have been exposed or who develops symptoms consistent with measles to call their healthcare provider before seeking care so proper precautions can be taken at medical facilities.
Vaccination remains the best protection against measles infection; two doses of MMR vaccine are recommended for full protection. Those unsure about their immunity status should consult their healthcare provider.



