State health officials say no one in New Jersey has died from the illness. Twelve patients remain hospitalized, and all of those sickened continue to recover.
The so-called “babygrams” were quickly stopped after they were discovered at the State University of New York Downstate Medical Center in Brooklyn in 2007.
The alert affects Briarcliff, Sleepy Hollow, Tarrytown, Grasslands Reservation, Elmsford, Irvington, Hawthorne, Valhalla, and Thornwood.
The Centers for Disease Control and Prevention said five states had widespread reports of flu last week, up from zero two weeks earlier.