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Mean age of children infected with influenza A virus, adenovirus, human metapneumovirus (hMPV), parainfluenza virus 1 (PIV1), and respiratory syncytial virus (RSV)
| Virus | Mean age of infected children (months) |
|---|---|
| Influenza A virus | 14.6 |
| Adenovirus | 12.2 |
| hMPV | 10.1 |
| PIV1 | 8.7 |
| RSV | 5.8 |
