Table 2 Ratio of children with previously reported positive SARS-CoV-2 testǂ to all children with SARS-CoV-2 IgG antibodies, as determined by an Enzyme-Linked Immunosorbent Assay (ELISA), in different phases of the pandemic according to the date of study recruitment.
Previously reported positive SARS-CoV-2 testa (known infection) | Total-SARS-CoV-2 positive ELISA (IgG antibodies) | Known: total | |
|---|---|---|---|
All age groups | |||
Total observation period | 119 | 461 | 1: 3.9 |
Jun–Sep 2020 | 10 | 86 | 1: 8.6 |
Oct 2020–Feb 2021 | 49 | 208 | 1: 4.2 |
Mar–May 2021 | 60 | 167 | 1: 2.8 |
A | < 3 years | ||
Total observation period | 12 | 97 | 1: 8.1 |
Jun–Sep 2020 | 1 | 28 | 1: 28 |
Oct 2020–Feb 2021 | 7 | 44 | 1: 6.3 |
Mar–May 2021 | 4 | 25 | 1: 6.3 |
B | 3–11 years | ||
Total observation period | 41 | 183 | 1: 4.5 |
Jun–Sep 2020 | 3 | 28 | 1: 9.3 |
Oct 2020 – Feb 2021 | 14 | 82 | 1: 5.9 |
Mar–May 2021 | 24 | 73 | 1: 3.0 |
C | 12–17 years | ||
Total observation period | 66 | 181 | 1: 2.7 |
Jun–Sep 2020 | 6 | 30 | 1: 5 |
Oct 2020–Feb 2021 | 28 | 82 | 1: 2.9 |
Mar–May 2021 | 32 | 69 | 1: 2.2 |
