Hepatitis B is a blood borne pathogen that attacks and injures the liver. It’s the most common cause of serious liver infection in the world, and approximately one out of every 20 people in the US will be infected with it at some point in their lives. Most of those infected display no symptoms, so the only way to be certain of your status is through testing. The most effective prevention is the vaccine that is available, but always use condoms correctly and consistently, avoid sharing intravenous drug equipment, avoid unprofessional tattoos or piercings and get tested regularly. Find convenient, low-cost testing options here.