| Symptoms | Frequency = 100 | Percentage (%) |
| Fever (≥37.5˚C) | 92 | 92 |
| Body weakness | 90 | 90 |
| Headache | 85 | 85 |
| Malaise | 80 | 80 |
| Loss of appetite | 80 | 80 |
| Nausea | 72 | 72 |
| Vomiting | 70 | 70 |
| Abdominal pains | 50 | 50 |