Patrons who visited the Comstock Saloon, a San Francisco restaurant and bar, during several days in December may have been exposed to the Hepatitis A virus, according to local news station KGO-TV. An employee tested positive for the virus after working Dec. 12-15, 2013, and again on Dec. 19. That employee was not a food handler, according to the restaurant management. While health officials say there is little risk of patrons contracting Hepatitis A, anyone who visited the restaurant on those days and has not been vaccinated has been advised to get tested. Symptoms of Hepatitis A infection may include fatigue, diarrhea, muscle aches, vomiting, fever and jaundice. Those who have been vaccinated for Hepatitis A once in the past are safe from infection.