<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 symptoms1 week after onset of symptoms  <response>: The viruses shed in feces during the late incubation period and prodromal phase of illness REF:ANANTHANARAYANAN TTEXTBOOKOF MICROBIOLOGY 9EDITION PGNO.541 