Hundreds of people in Greater Cincinnati are contracting hepatitis A.Butler County has the highest number of cases both in our area and in the state of Ohio.The county normally handles one case per year, if any at all. In the past five months, though, 245 people in the county have been infected. Nine out of 10 cases are among drug users, and not just people sharing needles. Health departments say marijuana users are being affected, too.Sixty percent of the people infected end up hospitalized, health officials say.So how do you protect yourself?Health officials recommend getting the hepatitis A vaccine. It's strongly recommended for anyone in a high-risk group, such as IV drug users, people in jail and anyone experiencing homelessness.People who work in the food service industry are also encouraged to get vaccinated. WLWT has reported on several incidents of food handlers in our area who contracted hepatitis A.If you think you have come in contact with hepatitis A, health officials say to get the vaccine within 10 days.Click here for more information about hepatitis A from the Centers for Disease Control and Prevention