Table 3.
Vaccine Effectiveness by Dose against COVID-19 Pneumonia.
| COVID-19 Pneumonia | |||
|---|---|---|---|
| Age (years) |
Number of vaccinations | Patients n/total (%) |
Vaccine effectiveness* percent (95% CI) |
| All | 0 | 150/34,211 (0.4%) | Reference |
| 1 | 5/708 (0.7%) | −3.1% [−141.0-55.9] | |
| 2 | 179/30,308 (0.6%) | 34.7% [19.5-47.1] | |
| 3 | 126/25,610 (0.5%) | 77.6% [71.8-82.2] | |
| 4 | 14/2,173 (0.6%) | 88.0% [79.3-93.1] | |
| Over 65 | 0 | 93/1,012 (9.2%) | Reference |
| 1 | 3/38 (7.9%) | 13.6% [−160.8-71.4] | |
| 2 | 138/1,550 (8.9%) | 12.5% [−12.6-32.0] | |
| 3 | 110/4,453 (2.5%) | 73.2% [65.0-79.4] | |
| 4 | 14/1,413 (1.0%) | 87.7% [78.6-93.0] | |
*Adjusted for age, sex, comorbidities, obesity, pregnancy, and smoking status. CI: confidence interval