- Any proposal to add further doses (boosters) later in order to provide a fleeting efficacy boost to the Pfizer vaccines for preschoolers would have to ignore the fact that that the Pfizer shots in the 5-11 year range led to very poor efficacy; 31% according to the CDC and 12% after 7 weeks according to a massive database comprising over 1.3 million children (365,000 of whom were vaccinated) from the NY Department of Health. Five to 11-year-old children dropped into the negative efficacy by 8 weeks after receiving the second dose. See Figure below.
The study above was the largest COVID vaccine efficacy study in children ever published, using the highest quality, official data from NY state. There was a large, linear drop in efficacy seen with each successive week following full vaccination. Extremely narrow confidence intervals confirm the validity of these data.
By 8 weeks following their second dose, vaccinated children were placed at higher risk of developing COVID than unvaccinated children. By 9 weeks, their risk was even higher. Despite illogical attempts to minimize this finding, the fact is that being vaccinated placed these children in a higher risk category for a COVID infection than if they had never been vaccinated."