Table 3.
Characteristics of the study populations.
| Preschool children | Primary school children | Preschool adults* | Primary school adults* | |
|---|---|---|---|---|
| Saliva samples, n | 504 | 333 | 308 | 75 |
| Age, median in years (range) | 4 (1 – 6) | 9 (6-10) | 38 (19-62) | 46 (20-67) |
| Previous cold-like symptoms, n (%) | 244 (48) | 124 (37) | 102 (33) | 30 (40) |
| Previous SARS-CoV-2 infection, n (%) | 2 (0.4): 2c | 2 (0.6): 1b, 1c | 5 (1.6): 1b, 4c | 1 (1.3): b |
| Previous SARS-CoV-2 infection in household member, n (%) | 13 (2.6): 9b, 4c | 8 (2.4): 2a, 1b, 5c | 6 (1.9): 1a,1b, 4c | 2 (2.6): 1b, 1c |
| Loss of taste/smelt in household members, n (%) | 12 (2.4%) | 7 (2.1%) | 7 (2.3%) | 2 (2.6%) |
*Adults, accompanying parents and tutors; a, Reported a positive PCR within 6 months prior to sampling; b, Reported a positive ELISA within 6 months prior to sampling; c, No information provided if prior diagnosis was based on PCR or ELISA.