World Hepatitis Day: An 1885 smallpox vaccine mystery that helped unravel hepatitis
This article explores the historical origins of hepatitis research, tracing back to an 1885 smallpox vaccination incident in Germany. It explains how early medical observations of jaundice outbreaks helped scientists eventually identify the viral nature of the disease.
Why it matters
Understanding the history of medical breakthroughs highlights the evolution of sterile practices and the long-term scientific effort required to combat global health challenges.
For thousands of years, people saw yellow eyes, dark urine and unexplained liver disease, but no one knew what caused them. Ancient Chinese writings described outbreaks of jaundice nearly 5,000 years ago. Babylonian records also mention similar illnesses more than 2,500 years ago. Yet for centuries, hepatitis remained one of medicine's greatest mysteries.Doctors could recognise the disease, but they had no idea what was spreading it. Some blamed bad air, others suspected contaminated food or water. The real answer, that different viruses were responsible, would only emerge in the twentieth century after decades of painstaking research.A strange outbreak after a smallpox vaccination changed everythingOne of the most important clues appeared in 1885 at the Bremen shipyard in Germany. After workers received vaccinations against smallpox, 191 people developed what was then called "catarrhal jaundice." The vaccination itself was not causing hepatitis in the way people first feared.
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