Days after Somerset County health officials announced a ShopRite deli employee infected with hepatitis A may have exposed customers to the disease over an 18-day span last month, free vaccinations will offered Wednesday and Thursday.

The walk-in clinic will be held from noon to 8 p.m. both days at the Somerset County Human Services Building, 27 Warren Street, Somerville. Free parking is available in the parking deck next to the building. No appointment is necessary.

The Somerset County Health Department says any food purchased the ShopRite on Davenport Street in Somerville between Oct. 13 and 30 should be thrown away.

Anyone who ate food purchased in the deli or appetizer departments who have not previously been vaccinated should do so to prevent getting sick. The vaccine should be received within two weeks after eating food from the deli, officials said.

Symptoms of hepatitis A infection include fatigue, low appetite, stomach pain, nausea and jaundice. They can appear up to 50 days after exposure.

The New Jersey Department of Health says 332 people have required hospitalization among the 396 cases for which officials have data. Six deaths have been reported, including one person who got exposed at a golf club in Morris County.

As of late October, there have been 533 cases of hepatits A in New Jersey since Dec. 1, 2018, a dramatic increase from previous years.

Jeff Goldman may be reached at jeff_goldman@njadvancemedia.com. Follow him on Twitter @JeffSGoldman. Find NJ.com on Facebook.

Have a tip? Tell us. nj.com/tips. Get the latest updates right in your inbox. Subscribe to NJ.com’s newsletters.