The city's Health Department is urging people who ate dessert at the popular West Village restaurant Alta between March 23 and April 2 to get a hepatitis A vaccination as soon as possible.
A food handler tested positive for the liver disease.
The restaurant estimates that as many as 3,000 people visited the restaurant during the risk period, and about 15 percent of them ate dessert.
If you are one of them, health officials urge you to see your doctor to get a shot.
"We are asking these restaurant patrons to get this vaccination as a precautionary measure," said Dr. Thomas Farley, the health commissioner. "If people experience symptoms, they should see a doctor immediately. This incident serves as an important reminder to always wash your hands thoroughly to prevent the spread of disease."
Symptoms include jaundice, fatigue, abdominal pain, nausea, and diarrhea, health official said.