The Pfizer-BioNTech vaccine is 88 percent effective against symptomatic COVID-19 caused by the Delta variant two weeks after the second dose, while the jab is 93 percent effective for cases caused by the Alpha variant.
https://www.aljazeera.com/news/2021/...-delta-variant
Originally Posted by SpeedRacerXXX
I got 80% from this study:
https://www.thelancet.com/journals/l...358-1/fulltext
Here’s a summary:
https://pharmaceutical-journal.com/a...study-suggests
It’s 79% in the study but some of the posters here aren’t very good with numbers so I rounded up.
79% is better than many people thought we’d have back a year ago. We were willing to accept any vaccine that was over 50% effective. If every unvaccinated individual got the Pfizer vaccine tomorrow we’d probably wipe COVID from the face of the earth. Unfortunately that can’t happen, because there’s not enough of the vaccine and there are a lot of scaredy cats out there.
Levianon should note that the Pfizer vaccine is more than 79% effective in preventing hospitalization. The Scottish study referenced above said they didn’t know how much more effective because they didn’t have enough data. The Scottish researchers also said the Delta variant was about 2X likelier to send people to the hospital.
The study assumed people were fully vaccinated only if 14 days had passed since their second shot. If they’d assumed 28 days the effectiveness would have been higher than 79%. Also Pfizer and others are working on booster shots and new vaccines that will be more effective against variants. With mRNA technology they can develop the boosters reasonably quickly