“…The predominance of NoVs GII strains detected in the present study is in agreement with previous reports of a higher prevalence of GII strains over GI in outbreaks, as well as studies on sporadic gastroenteritis (3,4,8,9,11,20,23,24,25,26,33,35). The reason for this is unknown, although differences in biological properties, such as virulence, routes of transmission, or stability of the virus in the environment, are possible explanations (4).…”