Study ID | Study follow‐up (months) | WIV04 (n) | Placebo (n) | Critical outcomes | ||||||
Confirmed SARS‐CoV‐2 infection after complete vaccination | Confirmed symptomatic COVID‐19 after complete vaccination | Severe or critical COVID‐19 | All‐cause mortality | Systemic reactogenicity events | Any AE | SAE | ||||
Al Kaabi 2021 (NCT04510207; ChiCTR2000034780) |
5 | 13,470 | 13,471 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
Guo 2021 (ChiCTR2000031809) | 4.77 | 168 | 168 | * | * | * | * | ✓ | ✓ | ✓ |