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Almost a decade ago, the high prevalence of respiratory viral infections among young children was demonstrated in a longitudinal study (NEJM JW Infect Dis Oct 2015 and Clin Infect Dis Oct 2015; 61:1217); nonetheless, quantifying the duration of viral shedding has been challenging. Now, in the PREVAIL cohort study spanning 15 months in Cincinnati and involving healthy mother-infant pairs, investigators have identified factors influencing the shedding of common respiratory viruses.
Infant nasal swabs collected weekly by mothers were tested with PCR for influenza A and B, RSV, human metapneumovirus, parainfluenza 1, 2, and 3, rhino/enterovirus, bocavirus, and endemic human coronaviruses. Weekly surveys of symptoms as well as medical records yie…