Table 2.
Observed positivity rates by assays across the three serosurveys, stratified by vaccination status and dose for June 2021
| Test | Detected antigen | Positive May 2020 (%) | Positive November 2020 (%) | Positive June 2021 (%) | ||
|---|---|---|---|---|---|---|
| Unvaccinated (%) | 1 dose (%) | 2 doses (%) | ||||
| Abbott | N | 86/92 (93,5) | 28/93 (30,1) | 0/76 (0) | 3/76 (3,9) | 6/76 (7,9) |
| DiaSorin | S | 85/101 (84,2) | 72/93 (77,4) | 20/35 (57,1) | 21/21 (100) | 20/20 (100) |
| Roche | N | 92/92 (100) | 90/93 (96,8) | 33/76 (43,4) | 19/76 (25,0) | 19/76 (25,0) |
| Neutralisation | S | 44/98 (44,9) | 23/93 (24,7) | 2/35 (5,7) | 21/21 (100) | 20/20 (100%) |