Environmental surveillance of norovirus in Argentina revealed distinct viral diversity patterns, seasonality and spatio-temporal diffusion processes

► Environmental presence of norovirus (NoV) was detected in five rivers from Argentina. ► Distinct NoV patterns were observed in rivers impacted by different-sized communities. ► Environmental surveillance revealed viral dissemination, diversity and seasonality. ► A geographically structured viral population was observed for GII-4 2006b variant. ► A route for global NoV dissemination is proposed with Europe as an intermediate path.