Hepatitis What is Hepatitis?Hepatitis is a viral infection that causes inflammation of the liver. There are three main types: A, B, and C. They all have similar symptoms but are caught in different ways and have different consequences for your health. Hepatitis A and B are preventable by vaccination, given by a short course of injections, which gives you protection over several years. Gay men can get the hep B vaccination free of charge at GUM clinics. Some clinics also offer vaccination against hepatitis A. Since a significant number of gay men are hepatitis B carriers, being vaccinated is highly recommended. There are no vaccines available against hepatitis C.