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Hepatitis A is an infectious disease of the liver caused by Hepatovirus A (HAV); [7] it is a type of viral hepatitis. [8] Many cases have few or no symptoms, especially in the young. [ 1 ] The time between infection and symptoms, in those who develop them, is two–six weeks. [ 2 ]
Stephen Mark Feinstone is a virologist who, together with Albert Kapikian and Robert Purcell, co-identified the Hepatitis A virus (HAV) in 1973. [1]He completed his undergraduate education at Johns Hopkins University graduating in 1966, and completed his medical degree at the University of Tennessee in 1969. [2]
In the 1960s, the first virus that could cause hepatitis was discovered. This was hepatitis B virus, which was named after the disease it causes. [220] Hepatitis A virus was discovered in 1974. [221] The discovery of hepatitis B virus and the invention of tests to detect it have radically changed many medical, and some cosmetic procedures.
In the 1990s, they discovered Hepatitis E virus. [4] Purcell also helped to develop the first licensed vaccine against hepatitis A virus, and was also involved in developing a vaccine against hepatitis B and D viruses, and a vaccine candidate for protection from hepatitis E virus. [4]
Hepatitis D is a defective virus that requires hepatitis B to replicate and is only found with hepatitis B co-infection. [17] In adults, hepatitis B infection is most commonly self-limiting, with less than 5% progressing to chronic state, and 20 to 30% of those chronically infected developing cirrhosis or liver cancer. [ 31 ]
CENTER TWP. ― A Hepatitis A outbreak traced to a Beaver County restaurant 20 years ago may have led to many of the national food safety guidelines implemented in the last several years.
Hepatitis A vaccine is a vaccine that prevents hepatitis A. [ 2 ] [ 3 ] It is effective in around 95% of cases and lasts for at least twenty years and possibly a person's entire life. [ 4 ] If given, two doses are recommended beginning after the age of one. [ 2 ]
G7 nations say Russia’s deployment of North Korean troops is a sign of desperation as Vladimir Putin looks to plug troop losses