| Viruses | Without recurrent wheezing | With recurrent wheezing |
| Subjects n | 124 | 138 |
| RSV | 45.6 | 31.9 |
| RV*,# | 3.2 | 10.9 |
| RSV + hBoV | 4.8 | 3.6 |
| hBoV | 2.4 | 3.6 |
| hMPV | 0.8 | 0.7 |
| PIV type 1 | 0.8 | 0 |
| PIV type 3 | 0.8 | 1.4 |
| IV A | 0.8 | 0 |
| hCoV | 0.7 | 0 |
| RSV + PIV type 3 | 0.8 | 0 |
| RSV + RV | 0.8 | 0 |
| hBoV + hMPV | 0 | 0.7 |
| RV + hMPV | 0 | 0.7 |
Data are presented as %; unless otherwise stated. RSV: respiratory syncytial virus; RV: rhinovirus; hBoV: human bocavirus; hMPV: human metapneumovirus; PIV: parainfluenza virus; IV A: influenza A virus; hCoV: human coronavirus. #: p<0.005, RV versus RSV. *: p<0.05, RV versus RSV + hBoV.