[Results: A total of twenty articles were included in this meta-analysis. After the first dose of the vaccine, the total effectiveness of all COVID-19 vaccines in our study was 71% (95% CI 0.65, 0.78). The total effectiveness of vaccines after the second dose was 91% (95% CI 0.88, 0.94)

[Results: A total of twenty articles were included in this meta-analysis. After the first dose of the vaccine, the total effectiveness of all COVID-19 vaccines in our study was 71% (95% CI 0.65, 0.78). The total effectiveness of vaccines after the second dose was 91% (95% CI 0.88, 0.94)).]https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://pubmed.ncbi.nlm.nih.gov/37208749/%23:~:text%3DResults%253A%2520A%2520total%2520of%2520twenty,%2525%2520CI%25200.88%252C%25200.94)).&ved=2ahUKEwimmqeQtPaBAxXRvokEHehQC5cQFnoECAcQBQ&usg=AOvVaw2fjTGKPkb3udxDFkZi9Fz7 )

Results: A total of twenty articles were included in this meta-analysis. After the first dose of the vaccine, the total effectiveness of all COVID-19 vaccines in our study was 71% (95% CI 0.65, 0.78). The total effectiveness of vaccines after the second dose was 91% (95% CI 0.88, 0.94)).).&ved=2ahUKEwimmqeQtPaBAxXRvokEHehQC5cQFnoECAcQBQ&usg=AOvVaw2fjTGKPkb3udxDFkZi9Fz7 )