New Jersey health officials have reported the state’s first confirmed pediatric death from influenza during the 2025–2026 flu season, as flu activity remains unusually high.

The child, who was under 5 years old and lived in the northern part of the state, had no known underlying medical conditions, the New Jersey Department of Health said. Officials did not release further details.

“This flu season is already shaping up to be a very serious one, with more cases than previous years and, tragically, one child’s death this week,” Acting Health Commissioner Jeff Brown said in a statement.

Health officials said influenza activity across the state remains elevated, with high numbers of people sick enough to seek care from doctors, emergency departments and hospitals.

The department stressed that vaccination remains the most effective way to prevent severe illness and reduce the spread of the flu, as well as other respiratory viruses such as COVID-19 and respiratory syncytial virus, or RSV.

The New Jersey Department of Health and the American Academy of Pediatrics recommend flu shots for everyone 6 months and older. Those at higher risk of serious complications include young children — especially those under 2 — adults 65 and older, pregnant people, and those with chronic conditions such as asthma, heart disease or diabetes.

Although flu shots are typically encouraged earlier in the season, health officials said it is not too late to get vaccinated. Flu activity often continues into the spring and can last as late as May. It takes about two weeks after vaccination for the body to build the strongest protection.

Flu vaccines are available at doctors’ offices, pharmacies, federally qualified health centers and local health departments. The state also offers free or low-cost vaccines through programs for uninsured and underinsured residents, including children and adults who qualify.

In addition to vaccination, the department recommended everyday prevention measures such as frequent hand washing, covering coughs and sneezes, staying home when sick, avoiding close contact with people who are ill and wearing masks in crowded indoor settings.