keeping you from getting it. And if you do get it even though it is highly unlikely you do, it lessens the effects.
https://www.livescience.com/covid-19-vaccine-efficacy-explained.html
One common misunderstanding is that 95% efficacy means that in the Pfizer clinical trial, 5% of vaccinated people got COVID. But that's not true; the actual percentage of vaccinated people in the Pfizer (and Moderna) trials who got COVID-19 was about a hundred times less than that: 0.04%.
What the 95% actually means is that vaccinated people had a 95% lower risk of getting COVID-19 compared with the control group participants, who weren't vaccinated. In other words, vaccinated people in the Pfizer clinical trial were 20 times less likely than the control group to get COVID-19.
Edited by TigerJackSwartz at 16:15:56 on 04/07/21