Covid vaccines saved around 20 million lives in the first year they were introduced, a new study has found.
Researchers, led by academics at Imperial College London, made estimates on the effectiveness of the vaccines in 185 countries since the first dose was administered in December 8, 2020.
It found that more deaths were prevented in wealthier countries in the year that followed. The total number of lives saved in high and middle income countries was 12.2 million.
