“…This also applies to newborn wards, in which HRV occurs endemically. Here, up to 50% of babies excrete the virus with the feces, but according to the observation of various authors [4,7,15,16], most of them (up to three quarters) remained asymptomatic. On the one hand, the protection by maternal antibodies in the first months of life (especially in breast-fed babies) is discussed as an explanation for this [4].…”