How effective are the top COVID-19 vaccines?
The makers of Pfizer-BioNTech coronavirus vaccine has said that it has shown 95% effectiveness in the last-stage trials. American biotechnology company Moderna announced its vaccine was 94.5% effective based on interim data from late-stage clinical trial. The Oxford vaccine candidate triggered a robust immune response in adults aged 56-69 and over 70 according to phase 2 clinical trial results.