World Hepatitis Day
Event Date: July 28, 2019
July 28 is World Hepatitis Day. World Hepatitis Day is recognized annually on July 28th, the birthday of Dr. Baruch Blumberg. Dr. Blumberg discovered the hepatitis B virus in 1967. Two years later Dr. Blumberg developed the first hepatitis B vaccine and won the Nobel Prize.
Viral hepatitis — a group of infectious diseases known as hepatitis A, B, C, D, and E — affects millions of people worldwide, causing both acute (short-term) and chronic (long-term) liver disease. The World Health Organization (WHO) data show an estimated 325 million people worldwide are living with chronic hepatitis B or chronic hepatitis C. Viral hepatitis caused more than one million deaths each year, a number comparable to deaths caused by tuberculosis and HIV combined. While deaths from tuberculosis and HIV have been declining, deaths from hepatitis are increasing.
The five hepatitis viruses are distinct, can have different modes of transmission, affect different populations, and result in different health outcomes.
- Hepatitis A is primarily spread when someone ingests the virus from contact with food, drinks, or objects contaminated by feces from an infected person or has close personal contact with someone who is infected. Hepatitis A does not cause chronic liver disease and is rarely fatal, but it can cause serious symptoms. Hepatitis A can be prevented through improved sanitation, food safety, and vaccination.
- Hepatitis B is often spread during birth from an infected mother to her baby. Infection can also occur through contact with blood and other body fluids through injection drug use, unsterile medical equipment, and sexual contact. Hepatitis B is most common in sub-Saharan Africa and Asia, but is also high in the Amazon region of South America, the southern parts of eastern and central Europe, the Middle East and the Indian subcontinent. The hepatitis B virus can cause both acute and chronic infection, ranging in severity from a mild illness lasting a few weeks to a serious, chronic illness. If infected at birth or during early childhood, people are more likely to develop a chronic infection, which can lead to liver cirrhosis or even liver cancer. Getting the hepatitis B vaccine is the most effective way to prevent hepatitis B.
- Hepatitis C is spread through contact with blood of an infected person. Infection can occur through injection drug use and unsafe medical injections and other medical procedures. Mother-to-child transmission of hepatitis C is also possible. Hepatitis C can cause both acute and chronic infections, but most people who get infected develop a chronic infection. A significant number of those who are chronically infected will develop liver cirrhosis or liver cancer. With new treatments, over 90% of people with hepatitis C can be cured within 2-3 months, reducing the risk of death from liver cancer and cirrhosis. The first step for people living with hepatitis C to benefit from treatments is to get tested and linked to care. There is currently no vaccine for hepatitis C but research in this area is ongoing.
- Hepatitis D is passed through contact with infected blood. Hepatitis D only occurs in people who are already infected with the hepatitis B virus. People who are not already infected with hepatitis B can prevent hepatitis D by getting vaccinated against hepatitis B.
- Hepatitis E is spread mainly through contaminated drinking water. Hepatitis E usually clears in 4-6 weeks so there is no specific treatment. A vaccine to prevent hepatitis E has been developed and is licensed in China, but is not yet available elsewhere.