Clinical characteristics of the study population based on different defined intervals of PCR repositivity
| Variable | First infection | Second infection | ||||
| Minimum interval of PCR repositivity | Minimum interval of PCR repositivity | |||||
| 45 days | 60 days | 90 days | 45 days | 60 days | 90 days | |
| (n=30) | (n=23) | (n=14) | (n=29)* | (n=23) | (n=14) | |
| Disease severity | ||||||
| Asymptomatic | 13 (43.3%) | 12 (52.2%) | 8 (57.1%) | 16 (55.2%) | 12 (52.2%) | 5 (35.7%) |
| Mild illness | 15 (33.3%) | 9 (39.1%) | 4 (28.6%) | 9 (31%) | 7 (30.4%) | 5 (35.7%) |
| Mild pneumonia | 1 (3.3%) | 1 (4.3%) | 1 (7.1%) | 0 | 0 | 0 |
| Severe pneumonia | 1 (3.3%) | 1 (4.3%) | 1 (7.1%) | 4 (13.8%) | 4 (17.4%) | 4 (28.6%) |
| Reason for testing | ||||||
| Close contact testing | 13 (43.3%) | 12 (52.2%) | 8 (57.1%) | 6 (20.7%) | 5 (21.7%) | 4 (28.6%) |
| Hospitalisation screening | 5 (16.7%) | 4 (17.4%) | 3 (21.4%) | 7 (24.1%) | 6 (26.1%) | 5 (35.7%) |
| Suspected COVID-19 | 12 (40%) | 7 (30.4%) | 3 (21.4%) | 6 (20.7%) | 5 (21.7%) | 4 (28.6%) |
| Travel screening | 1 (3.3%) | 0 | 0 | 10 (34.5%) | 7 (30.4%) | 1 (7.1%) |
| Symptoms | ||||||
| Abdominal pain | 2 (4%) | 1 (3.1%) | 1 (5%) | 0 | 0 | 0 |
| Cough | 4 (8.2%) | 4 (12.5%) | 3 (15%) | 8 (20.5%) | 8 (21.6%) | 7 (21.9%) |
| Diarrhoea | 2 (4%) | 2 (6.3%) | 2 (10%) | 0 | 0 | 0 |
| Fever | 16 (32.6%) | 11 (34.4%) | 6 (30%) | 12 (30.8%) | 10 (27%) | 8 (25%) |
| Headache | 2 (4%) | 2 (6.3%) | 1 (5%) | 1 (2.6%) | 1 (2.7%) | 1 (3.1%) |
| Loss of smell | 4 (8.2%) | 1 (3.1%) | 0 | 1 (2.6%) | 1 (2.7%) | 1 (3.1%) |
| Loss of taste | 4 (8.2%) | 1 (3.1%) | 0 | 1 (2.6%) | 1 (2.7%) | 1 (3.1%) |
| Myalgia | 4 (8.2%) | 3 (9.4%) | 3 (15%) | 1 (2.6%) | 1 (2.7%) | 1 (3.1%) |
| Rhinorrhoea | 4 (8.2%) | 3 (9.4%) | 1 (5%) | 8 (20.5%) | 8 (21.6%) | 7 (21.9%) |
| Shortness of breath | 3 (6.1%) | 2 (6.3%) | 2 (10%) | 3 (7.7%) | 3 (8.1%) | 3 (9.4%) |
| Sore throat | 3 (6.1%) | 2 (6.3%) | 1 (5%) | 3 (7.7%) | 3 (8.1%) | 2 (6.3%) |
| Vomiting | 1 (2%) | 0 | 0 | 1 (2.6%) | 1 (2.7%) | 1 (3.1%) |
| Hospitalisation | 5 (16.7%) | 4 (17.4%) | 3 (21.4%) | 6 (20.7%) | 5 (21.7%) | 5 (35.7%) |
| Length of stay in days (median, IQR) | 9 (5.75–13) | 9 (7.25–11) | 8 (6.5–9) | 6 (3–6) | 6 (3–6) | 6 (3–6) |
*Clinical data for one patient is missing.