Table 1.
Characteristics of the selected studies.
| Study | Country | Study design | Vaccine type | Positive | Negative | ||
|---|---|---|---|---|---|---|---|
| Fully vaccinated* | Not vaccinated | Fully vaccinated* | Not vaccinated | ||||
| Lauring et al. (14) | USA | Case-control | BNT162b2, mRNA-1273 | 291 | 268 | 3908 | 2054 |
| Tseng et al. (15) | USA | Case-control | mRNA-1273 | 13412 | 8590 | 32882 | 17051 |
| Accorsi et al. (16) | USA | Case-control | BNT162b2, mRNA-1273 | 9686 | 3412 | 38043 | 8721 |
| Thompson et al. (17) | USA | Case-control | BNT162b2, mRNA-1273 | 3272 | 3572 | 8876 | 3884 |
| Collie et al. (18) | South Africa | Case-control | BNT162b2 | 9700 | 7889 | 35957 | 18442 |
| Andrews et al. (12) | UK | Case-control | ChAdOx1, BNT162b2, mRNA-1273 | 753437 | 101109 | 1285532 | 107238 |
| Klein et al. (19) | USA | Case-control | BNT162b2 | 1050 | 4434 | 1527 | 5203 |
| Ferdinands et al. (20) | USA | Case-control | BNT162b2, mRNA-1273 | 10289 | 13991 | 20464 | 10808 |
| Kodera et al. (23) | Japan | observatory | BNT162b2, mRNA-1273 | 25187 | 12681 | 103065994 | 35329428 |
| Acuti Martellucci et al. (25) | Italy | Cohort | ChAdOx1, BNT162b2, mRNA-1273, JNJ-78436735 | 95714 | 41281 | 827293 | 252421 |
| Horne et al. (24) | UK | Cohort | ChAdOx1, BNT162b2 | 845048 | 90451 | 1858123 | 2033092 |
| Kirsebom et al. (22) | UK | Case-control | ChAdOx1, BNT162b2, mRNA-1273 | 437276 | 59793 | 561848 | 37280 |
| Sheikh et al. (21) | UK | Cohort | ChAdOx1, BNT162b2, mRNA-1273 | 12067 | 1003 | 120071 | 9299 |
| Total | n = 13 | 2216429 | 348474 | 107860518 | 37834921 | ||
*
Fully vaccinated group included people had received at least two vaccine doses.