The Pediatric Study From the CDC
[Note: If you want to read the series about COVID shot effectiveness in chronological order, please start with, “The Truth About The COVID Shots,” posted on August 11, 2025.]
This one is interesting because it was a pediatric study done by the CDC in conjunction with medical institutions in Washington, Oregon, Michigan, Arizona, and Utah. It’s called Protection from COVID-19 vaccination and prior SARS-CoV-2 infection among children aged 6 months – 4 years, United States, September 2022-April 2023. Even though the study period ended in early 2023, the paper was not published until January 2025.
First, it showed that natural immunity is effective protection from infection. “Participants with evidence of prior SARS-CoV-2 infection were less likely to be infected with SARS-CoV-2 and experience symptomatic COVID-19 compared with those who had no evidence of prior infection (HR: 0.21 [95% CI: 0.08-0.54]).” This amounts to a 79% reduction in risk of infection.
Overall, the vaccinated group had a 61% increased risk of infection compared to the unvaccinated group (HR: 1.61 [95% CI: 0.65-4.03]).
However, when looking specifically at the Pfizer vaccine combined with lack of natural immunity, that group’s performance was exceptionally poor. Pfizer-vaccinated children from the age of 6 months to 4 years without prior infection were 257% (HR 3.57, 95% CI: 1.10-11.63) more likely to develop symptomatic COVID-19 compared to the children who were unvaccinated.
This paper had 35 authors from 15 different medical institutions across the country, including the CDC and the University of Michigan. Funny, I didn’t hear about this study in the news. Did you?