Table 2.
Vaccination status and COVID-19 infection among controls without IRD
| Vaccine doses | Total | 0 | 1 | 2 | 3 |
|---|---|---|---|---|---|
| Controls without IRD | 524 471 | 181 770 (34.7%) | 50 256 (9.6%) | 226 156 (43.1%) | 66 289 (12.6%) |
| COVID-19 infection | 80 167 | 67 719 | 6,345 | 5,943 | 160 |
| Infections/Vaccinateda | 15.3% | 37.2% | 12.6% | 2.6% | 0.2% |
| Vaccine effectivenessb | 66.1% | 93% | 99.5% |
a
Percentage of COVID-19 infection per vaccine dose.
b
Vaccine effectiveness calculated according to the formula: VE = (NVAC – VAC)/NVAC. IRD: inflammatory rheumatic disease; VE: vaccine effectiveness; NVAC: attack rate among the unvaccinated; VAC: attack rate among the vaccinated.