Recruitment summary of children of healthcare workers and seroprevalence by site (N and (%) unless otherwise stated)
| Site | Screened | Included participants | Antibody positive | 95% CI |
| Belfast | 217 | 215 | 2 | 0.9 (0.2 to 3.3) |
| Cardiff | 192 | 178 | 10 | 5.6 (3.1 to 10.0) |
| Glasgow | 229 | 224 | 20 | 8.9 (5.9 to 13.4) |
| London | 215 | 199 | 23 | 11.6 (7.8 to 16.8) |
| Manchester | 189 | 176 | 13 | 7.4 (4.4 to 12.2) |
| Total | 1042 | 992 | 68 | 6.9 (5.4 to 8.6) |