The vaccine was introduced in 1992, but Maurice Hileman developed the first successful vaccine against Hepatitis A. The types of vaccinations currently available for the disease are an attenuated and inactivated form. Common commercial vaccines found today are Avaxim, Epaxal, Havrix, and Vaqta. People who need to be vaccinated are young children, those who are sexually active, and anyone with chronic liver disease to name a few. Also the U.S. Centers for Disease Control and Prevention state that people who travel to East Asia, Africa, South America, or Eastern Europe should be vaccinated, as the disease is common amongst travelers.