Endemic Norovirus Infections in Children, Ho Chi Minh City, Vietnam, 2009–2010

Abstract

We performed a case–control investigation to identify risk factors for norovirus infections among children in Vietnam. Of samples from 1,419 children who had diarrhea and 609 who were asymptomatic, 20.6% and 2.8%, respectively, were norovirus positive. Risk factors included residential crowding and symptomatic contacts, indicating person-to-person transmission of norovirus.

Keywords

• norovirus
• viruses
• diarrhea
• epidemiology
• risk factors
• symptomatic