Common complaints reported in post-exposure questionnaires
| Symptom | Subjects |
| Asymptomatic | 16 (35.6) |
| Sputum production | 13 (28.9) |
| Cough | 11 (24.4) |
| Nasal congestion | 9 (20.0) |
| Headache | 6 (13.3) |
| Sore throat | 6 (13.3) |
| Shortness of breath | 5 (11.1) |
| Other | 8 (17.8) |
| Total | 45 |
Data are presented as n (%) or n.