Pfizer's COVID-19 vaccine is 95% effective in final clinical trial results analysis


Pfizer and BioNTech said that a final data analysis found their coronavirus vaccine was 95% effective in preventing Covid-19. The vaccine, called BNT162b2, was highly effective against the virus 28 days after the first dose, and its effectiveness was consistent across all ages, races and ethnicities, the drugmakers said. Additionally, the elderly, who are seen as at high risk of severe illness from Covid-19, saw vaccine effectiveness of more than 94%, they added.


The Pfizer data in its final analysis shows that among a total of 170 confirmed COVID-19 cases so far among the 44,000 people who took part in the study, 162 cases came from the placebo group while only eight were from the group of those who received the actual vaccine candidate. The company also reported that 9 out of 10 of the severe cases among those who were infected occurred in the placebo group, suggesting that even in the rare occasion that the vaccine didn’t prevent contraction of COVID-19, it helped reduce its severity.


The companies reiterated that they expect to produce up to 50 million doses this year and up to 1.3 billion doses in 2021. They also said they are “confident” in their ability to distribute the vaccine, which requires a storage temperature of minus 94 degrees Fahrenheit.

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