Table 3. Vaccine effectiveness by brand of COVID-19 vaccine.
| Outcome |
Vaccination
history |
Completely primary vaccination | Partially vaccination | |||||
|
Percentage/%
(case/total infection) |
Unadjusted VE/%
(95% CI) |
Adjusted VE/%
(95% CI) |
Percentage/%
(case/total infection) |
Unadjusted VE/%
(95% CI) |
Adjusted VE/%
(95% CI) |
|||
| Note: “—” Means no data were available.
Abbreviations: CI=Confidence interval; VE=vaccine effectiveness. | ||||||||
| Symptomatic
disease |
Unvaccinated | 12.90 (61/473) | Ref | Ref | 12.90 (61/473) | Ref | Ref | |
| Vaccinated | 4.34 (34/784) | 66.37 (49.65 to 77.54) | 50.54 (27.59 to 66.21) | 5.37 (11/205) | 58.39 (22.60 to 77.63) | 33.76 (−17.53 to 62.67) | ||
| BBIBP-CorV | 4.27 (9/211) | 66.93 (34.66 to 83.26) | 50.56 (3.79 to 74.59) | 5.19 (4/77) | 59.72 (−7.59 to 84.92) | 24.72 (−98.83 to 71.49) | ||
| CoronaVac | 5.06 (17/336) | 60.77 (34.07 to 76.65) | 39.12 (−0.91 to 63.27) | 5.88 (7/119) | 54.39 (2.87 to 78.58) | 29.95 (−44.33 to 66.00) | ||
| Combined | 3.38 (8/237) | 73.83 (46.21 to 87.26) | 59.94 (19.09 to 80.17) | 0 (0/9) | — | — | ||
| Pneumonia | Unvaccinated | 10.15 (48/473) | Ref | Ref | 10.15 (48/473) | Ref | Ref | |
| Vaccinated | 2.42 (19/784) | 76.12 (59.88 to 85.79) | 61.40 (36.05 to 76.70) | 3.41 (7/205) | 66.35(26.90 to 84.51) | 45.92 (−15.82 to 74.75) | ||
| BBIBP-CorV | 2.84 (6/211) | 71.98 (35.54 to 87.82) | 54.71 (−3.42 to 80.16) | 3.90 (3/77) | 61.61(−20.2 to 87.74) | 16.33 (−164.3 to 73.52) | ||
| CoronaVac | 2.08 (7/336) | 79.47 (55.19 to 90.59) | 64.90 (22.88 to 84.02) | 3.36 (4/119) | 66.88(9.96 to 87.81) | 52.65 (−25.19 to 82.09) | ||
| Combined | 2.53 (6/237) | 75.05 (42.55 to 89.17) | 62.15 (13.95 to 83.35) | 0 (0/9) | — | — | ||
| Severe case | Unvaccinated | 3.17 (15/473) | Ref | Ref | 3.17 (15/473) | Ref | Ref | |
| Vaccinated | 0.26 (2/784) | 91.96 (64.98 to 98.15) | 82.41 (21.03 to 96.08) | 0.98 (2/205) | 69.24 (−33.30 to 92.90) | 44.48 (−162.62 to 88.26) | ||
| BBIBP-CorV | 0 (0/211) | — | — | 1.30 (1/77) | 59.05 (−205.6 to 94.51) | 7.49 (−655.64 to 88.68) | ||
| CoronaVac | 0 (0/336) | — | — | 0.84 (1/119) | 73.5 (−98.62 to 96.46) | 59.75 (−209.91 to 94.77) | ||
| Combined | 0.84 (2/237) | 73.39 (−15.41 to 93.86) | 61.35 (−71.62 to 91.30) | 0 (0/9) | — | — | ||