Table 1.
Clinical and laboratory characteristics of study participants during the two episodes of SARS-CoV-2 infection
| Clinical and laboratory characteristics | First episode of SARS-CoV-2 infection Number (%) |
Second episode of SARS-CoV-2 infection Number (%) |
P value |
|---|---|---|---|
| Asymptomatic | 18 (47.4) | 6 (15.8) | <0.001 |
| Symptoms | |||
| Cough | 11 (28.9) | 15 (39.5) | 0.70 |
| Fever | 9 (23.7) | 23 (60.5) | 0.09 |
| Sore throat | 6 (15.8) | 11 (28.9) | 0.1 |
| Other symptoms | 12 (31.6) | 14 (36.8) | Ref |
| Duration of symptoms in days, median (IQR), range | 5 (2.75−7.75), | 5 (3−7) | 0.09 |
| 2−14 | 2−20 | ||
| Type of test | |||
| RT-PCR | 37 (97.4) | 31 (81.6) | 0.07 |
| RAT | 1 (2.6) | 7 (18.4) | |
| Ct values (screening E gene), mean (s.d.) | 29.6 (6.9) | 24.9 (5.6) | 0.04 |
| n = 15 | n = 17 | ||
| Ct values (RdRp gene), mean (s.d.) | 26.4 (7.7) | 24.3 (5.8) | 0.9 |
| n = 12 | n = 9 | ||
| Ct values (ORF1 gene), mean (s.d.) | 32.4 (4.1) | 26.2 (8.7) | 0.31 |
| n = 12 | n = 18 | ||
Values are expressed as n(%) unless specified. RAT: rapid antigen test, RT-PCR: real-time reverse transcriptase polymerase chain reaction, Ct: cycle threshold.
Only one patient required mechanical ventilation in the second episode, none in the first episode.