The hits just keep coming to the Covid vaccine narratives. From Will Jones at dailyskeptic.org:

The study is a large observational study that looks at 887,193 children aged 5 to 11 years in North Carolina, of whom 273,157 (30.8%) received at least one dose of Pfizer vaccine between November 1st 2021 and June 3rd 2022. The study includes 193,346 SARS-CoV-2 infections reported between March 11th 2020 and June 3rd 2022.
The researchers used a form of statistical modelling with adjustments for confounding factors (such as underlying conditions) to calculate estimates of vaccine effectiveness over time and against the different Covid variants.