- Majority of cases are viral (adeno, corona, influenza A and B, metapneumo, parainfluenza, RSV, and rhino)
- Bacterial more common if co-existent COPD
- Acute onset cough
- Change in sputum (colored, thicker, increased volume)
- Fever, fatigue/feeling run down
- Not seriously ill or sob unless other co-morbid illnesses (e.g. COPD)
- Sometimes fever, though not ill appearing (if no co-morbidities)
- Sometimes scattered ronchi, but no findings of consolidation or alveolar filling
- Can trigger wheezing, in particular if hx asthma, COPD