Prevalence of symptoms in early patients at accident and emergency and the referent group
| Symptom | Prevalence in early patients n (%) | Prevalence in referent group n (%) | Relative rate for early patients | 95% CI (p value) |
| Abdominal pain | 12 (14.8) | 4 (4.8) | 3.07 | 1.03 to 9.04 (0.04) |
| Chest pain | 8 (9.9) | 0 (0.0) | — | (0.003) |
| Cough | 22 (27.2) | 10 (12.0) | 2.25 | 1.14 to 4.46 (0.02) |
| Diarrhoea | 12 (14.8) | 3 (3.6) | 4.10 | 1.20 to 14.0 (0.02) |
| Drowsiness | 15 (18.5) | 4 (4.8) | 3.89 | 1.33 to 11.1 (0.007) |
| Headache | 42 (51.9) | 17 (20.5) | 2.53 | 1.58 to 4.06 (<0.001) |
| Itchy eyes | 16 (19.8) | 9 (10.8) | 1.82 | 0.85 to 3.88 (0.13) |
| Nausea | 10 (12.3) | 2 (2.4) | 5.12 | 1.16 to 22.7 (0.02) |
| Shortness of breath | 19 (23.5) | 4 (4.8) | 4.87 | 1.73 to 13.7 (<0.001) |
| Skin rash | 10 (12.3) | 4 (4.8) | 2.56 | 0.84 to 7.84 (0.09) |
| Sore throat | 36 (44.4) | 12 (14.5) | 3.07 | 1.73 to 5.47 (<0.001) |
| Vomiting | 7 (8.6) | 2 (2.4) | 3.59 | 0.77 to 16.8 (0.17) |
| Weakness | 23 (28.4) | 4 (4.8) | 5.89 | 2.13 to 16.3 (<0.001) |
| Wheeze | 13 (16.0) | 4 (4.8) | 3.29 | 1.12 to 9.67 (0.02) |