This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
[{'content': 'Enterovirus 72 is \nSelect and explain. \nA. Hepatitis A, B. Hepatitis E, C. Hepatitis G, D. Hepatitis C', 'role': 'user'}, {'content': "Answer: A \nExplanation: Hepatitis A virus belongs to Enterovirus (picomavirus family) and was originally designated as\xa0“enterovirus-72”\n\nHepatitis ‘A' virus\n\n\xa0HAV is a non enveloped RNA virus.\n\xa0It is classified in genus Hepatovirus under family picomavirus.\n\xa0Originally called as enterovirus 72.\n\xa0It is the only human hepatitis virus which can be cultivated in vitro. It can be grown in some human and simian cell\n\ncultures.\n\n\xa0Most common cause of acute hepatitis in children.\n\xa0Transmission is by the fecal-oral route.\nThe virus is shed in feces during the late incubation period and the prodromal phase of the illness.\nMaybe present occasionally in the saliva and urine of patients, but this is not relevant in the spread.\n\nProphylaxis\nBoth passive and active prophylaxis are available.\nPassive prophylaxis by pooled normal human immunoglobulin is given IM\xa0before exposure or in\xa0the early incubation period.\nActive prophylaxis is by a conjugate vaccine containing HAV (inactivated by formalin) grown in\xa0human diploid cell culture.", 'role': 'assistant'}]