Viral detection in respiratory samples in asymptomatic children.

aRelated to geographical area.
bNumber of samples tested.
cStratified for season.
dPicornavirus general.
M, months of age; Y, years of age; HRV, human rhinoviruses; EV, entero viruses; AdV, adeno viruses; HBoV, human bocavirus; RSV, respiratory syncytial virus; hMPV, human metapneumovirus; CoV, corona viruses; IV, influenza viruses; PIV, para-influenza viruses; NS, not specified.