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Viruses Associated with the Common Cold
| Virus | Percentage of Cases* |
|---|---|
| Rhinovirus | 40 |
| Coronavirus | 10 |
| Parainfluenza virus Respiratory syncytial virus Influenza virus Adenovirus |
10–15 |
| Other viruses (enterovirus, rubeola, rubella, varicella) | 5 |
| Presumed undiscovered viruses | 20–30 |
| Group A β-hemolytic streptococci† | 5–10 |
Estimated percentage of colds annually.
Included because differentiation of streptococcal and viral pharyngitis is not possible by clinical means.
