INDIAN RIVER COUNTY — A food service worker in Vero Beach was identified as having hepatitis A and could have infected the general public, said Stacy Brock, spokeswoman for the Indian River County Department of Health.

Between July 19 and July 23, Brock said, a food service worker at Pizza Mia, 1115 21st St., in Vero Beach, had the virus, was infectious and could have spread it to others.

The case marks the fifth person in the county to have contracted the virus, officially designating Indian River County in an outbreak.

The county joins Martin and St. Lucie counties, who have both been in an outbreak for months. Martin County has 32 cases of the virus and St. Lucie County has 30.

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Hepatitis A is a highly contagious disease that attacks the liver. The majority of the people who get the virus have flu-like symptoms — such as nausea and fevers — but recover within a week or two.

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Health officials are encouraging anyone who ate or drank at the restaurant between July 19 and July 23 to get vaccinated for the virus and contact their healthcare providers if they experience symptoms.

If people don't get the vaccination within two weeks of their exposure date, they will be outside of the vaccination window and should monitor themselves for signs of the virus.

Signs include sudden onset of abdominal discomfort, nausea, vomiting, dark urine, fever, diarrhea, pale white stools, or yellow skin and eyes (jaundice). Anyone experiencing these symptoms should promptly seek medical attention.

If you previously have received the hepatitis A vaccine or have had a past history of a hepatitis A infection, you are considered immune to the hepatitis A virus and do not need to take additional action.