Evidence is increasing that cases of acute hepatitis of unknown origin in young children are linked to adenovirus, Centers for Disease Control and Prevention officials told reporters in a briefing on Friday (May 20). But the agency also continues to investigate other factors that potentially could be linked to the cases, including COVID-19 infection and multisystem inflammatory syndrome, which the coronavirus can cause in children. Jay Butler, deputy director for infectious diseases at the CDC, said adenovirus and particularly the...