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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] When symptoms occur, they typically last eight weeks and may ...
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 ]
Infectious diseases, gastroenterology. Viral hepatitis is liver inflammation due to a viral infection. [1][2] It may present in acute form as a recent infection with relatively rapid onset, or in chronic form, typically progressing from a long-lasting asymptomatic condition up to a decompensated hepatic disease and hepatocellular carcinoma (HCC).
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. [ 30 ]
Robert Harry Purcell[1] (born 19 December 1935 in Iowa, United States) is an American virologist and former co-chief of the Laboratory of Infectious Diseases at the U.S. National Institute of Allergy and Infectious Disease. He is known for his work on hepatitis viruses, and was involved in identifying hepatitis A virus, hepatitis D virus, and ...
Hepatitis A and B vaccine. Combined hepatitis A and B vaccine, is used to provide protection against hepatitis A and hepatitis B. [3][7] It is given by injection into muscle. [8] It is used in areas where hepatitis A and B are endemic, for travelers, people with hepatitis C or chronic liver disease, and those at high risk of sexually ...
[42] 90% of cases of chronic hepatitis D infection are thought to be due to superinfection in those already with hepatitis B. [42] Hepatitis B and D co-infection is likely to lead to acute hepatitis, but is usually self limited with regards to the hepatitis D infection. [42] Chronic hepatitis B and D is associated with a worse prognosis than ...
290,000 (2019) [4] Hepatitis C is an infectious disease caused by the hepatitis C virus (HCV) that primarily affects the liver; [2] it is a type of viral hepatitis. [6] During the initial infection period, people often have mild or no symptoms. [1] Early symptoms can include fever, dark urine, abdominal pain, and yellow tinged skin. [1]
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