Table 2. Clinical characteristics of participants with seasonal influenza.
| Number (%) | ||
| Sex | Male; female | 2035; 2408 (45.8;54.2) |
| Age | <13 | 929 (20.9) |
| 13<<64 | 3035(68.3) | |
| >65 | 480 (10.8) | |
| Body temperature | ≦37°C | 1777 (40) |
| 37.1°C <<37.9°C | 1085 (24.5) | |
| >38°C | 1581 (35.6) | |
| Type of influenza | A | 2133 (48) |
| B | 1643(37) | |
| H1N1 | 534(12) | |
| A+B | 133 (3) | |
| Symptoms | Sore throat | 2981 (67.1) |
| Weakness | 2874 (64.7) | |
| Fever | 2670 (60.1) | |
| Cough | 929 (20.9) | |
| Arthralgia | 870 (19.6) | |
| Headache | 635 (14.3) | |
| Abnormal behavior | 278 (6.3) | |
| Digestive symptom | 2 (0.1) | |
| Pharyngeal follicle | 3485 (78.4) |