Norovirus, a gastrointestinal virus, is thought to spread primarily by direct person-to-person contact or via foodborne, waterborne or environmental fomite routes . Although no evidence suggests that this virus is transmitted via the airborne route , the importance of this route has been suggested by several published reports . In terms of biological plausibility, the potential of airborne transmission of norovirus exists , based on the findings of virus-containing aerosol droplets produced by vomiting  and toilet flushing , the detection of dispersed norovirus in the air , and the successful infection of mice via intranasal instillation . In terms of outbreak investigations, a few studies  have claimed to provide evidence for the airborne transmission.