According to press reports, more than 300 people who had eaten at La Fontana restaurant in Nyack between March 29 and April 1 received free vaccines last weekend for Hepatitis A.
The Rockland County Department of Health gave out the free vaccines after announcing last week that a case of Hepatitis A had been identified in a worker at the restaurant.
But not everyone who may have been exposed was vaccinated.
The vaccine is most effective when given within 14 days of exposure to the virus, therefore patrons who ate at the restaurant between March 19 and March 28 would not benefit from vaccination, health officials said.
Instead they encourage those who were not vaccinated, but visited the restaurant between March 19 and April 1 to see a doctor if symptoms develop.