Hepatitis B is a disease caused by the hepatitis B virus (HBV), discovered in 1965 by Baruch Blumberg at the National Institutes of Health. Millions of people worldwide are infected through unprotected sexual contact, hematogenous spread, or maternal-fetal transmission. Without adequate diagnosis and treatment, these individuals may go on to develop liver failure, hepatocellular carcinoma, or die. Image courtesy of the US Centers for Disease Control and Prevention (CDC).
Hepatitis B is a worldwide healthcare problem. Roughly one third of the global population has been infected with HBV, and approximately 350 million are chronic carriers. However, due to aggressive vaccination plans, screening of blood products, and antiviral therapy, hepatitis B is now mainly a disease of the developing world. Epidemics still exist in parts of Asia and Africa. In high-prevalence areas without vaccination, perinatal transmission is the major mode of transmission. Image courtesy of the CDC
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http://www.medscape.com/features/slideshow/hepatitis
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