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Viral etiology of documented respiratory tract infection during 35 exacerbations in which non‐typeable H. influenzae was present in sputum culture
| Viral infection | Number of infections |
| Parainfluenza type 3 | 6 |
| Picornavirus | 6 |
| Influenza A/H3N2 | 5 |
| Coronavirus OC43 | 1 |
| Total | 18 |
