<prompt> Transmission of hepatitis A virus occurs -One week before and one week after onset of symptom2 weeks before onset of symptoms2 weeks after onset of symptomsAll  <response>: Ans. is b i.e., 2 weeks before onset of symptoms . The risk of transmission of HAV is greatest from 2 weeks before to I week after the onset of jaundice. . Infectivity falls rapidly with onset of jaundice. . HAV is excreted in feces for about 2 weeks before the onset of jaundice and for up to one week there after. . Infective material is mainly mans feces. . Blood and serum are infective during the brief period of viremia. 