N participants Total person-time (days) Symptomatic COVID-19 infections Incidence per 10,000 person-days Unadjusted* VE (95% CI) Adjusted** VE (95%CI)
Total Cohort* 1569
Unvaccinated 415 24745 8 3
≥14d from 2nd dose 1476 172457 64 4 16.6 (-75.3; 60.3) 29.0 (-51.4; 66.7)
Total Cohort, excluding participants with PCR-confirmed infection prior to enrolment** 1327
Unvaccinated 253 36012 8 2
≥14d from 2nd dose 1268 304360 61 2 36.8 (-32.7; 69.9) ***
DELTA PERIOD (1/07/21-12/1/21)
Total Cohort* 1565
Unvaccinated 293 17105 7 4
≥14d from 2nd dose 1478 147488 62 4 5.6 (-108; 57.1) 19.1 (-80.7; 63.8)
Total Cohort, excluding participants with PCR-confirmed infection prior to enrolment** 1322
Unvaccinated 181 21634 7 3
≥14d from 2nd dose 1266 248951 59 2 28.6 (-57.2; 67.6) ***