Possible COVID-19 infections based on information from PCR tests performed and physician diagnoses of initial respondents in the survey period 20 January 2021 to 31 April 2021 (n=2138)
| n (%) | |
| PCR test procedures | 2138 |
| Once | 511 (23.9) |
| Multiple times | 497 (23.2) |
| Never | 1130 (52.9) |
| Results of the PCR test | 1008 |
| Positive PCR test | 93 (9.2) |
| Negative PCR test | 913 (90.6) |
| Unknown | 2 (0.2) |
| Physician based COVID-19 diagnosis | 2138 |
| Yes | 69 (3.2) |
| No | 2069 (96.8) |
| Continuous symptoms until feeling healthy | 84 |
| Symptoms subsided with the end of the COVID-19 infection | 61 (72.6) |
| Intermediately partial recovery free of symptoms and then symptoms recurred | 23 (27.4) |