Here is 12% from https://www.cnbc.com/2022/02/28/pfizer-covid-vaccine-was-jus...
Although it is variant specific and from 5-11 age group
Although it is variant specific and from 5-11 age group
I've seen a 2 minute long video showing the declining percentages mainstream media claimed on the vaccine over the course of 3 months. Perhaps this one particular article was dishonest however.