World Hepatitis Day: An 1885 smallpox vaccine mystery that helped unravel hepatitis

Ancient writings noted jaundice, but its cause remained a mystery for millennia. Outbreaks after vaccinations and during wars revealed hepatitis spread through contaminated materials. Baruch S. Blumberg's discovery of the Australia antigen revolutionized hepatitis B detection and prevention. This led to identifying other hepatitis viruses, ending a long scientific investigation. Today, safer transfusions and vaccines benefit millions due to persistent scientific inquiry.