Table 1. Demographic characteristics and symptoms of subjects with and without detectable influenza virus RNA in exhaled breath.
| Exhaled breath negative | Exhaled breath positive | |
| Total number | 8 | 4 |
| Male | 75% | 75% |
| Average age (years) (SD*) | 37 (14) | 34 (19) |
| Age range (years) | 19–61 | 14–51 |
| Body temperature (°C) (SD*) | 38.3 (0.4) | 38.7 (0.6) |
| Symptom onset | ||
| 1–2 days past | 75% | 50% |
| 3–5 days past | 25% | 50% |
| Vaccinated this season | 13% | 0% |
| Symptoms | ||
| Cough | 100% | 75% |
| Sputum changes** | 13% | 25% |
| Fatigue | 100% | 100% |
| Malaise | 63% | 75% |
| Headache | 100% | 100% |
| Sore throat | 100% | 75% |
| Diarrhea | 0% | 0% |
| Dyspnea | 25% | 25% |
| Chills | 63% | 50% |
| Sweats | 63% | 50% |
*
SD = standard deviation
**
Increase in production or changes in character (color, consistency)