"Real-world studies on vaccine effectiveness may suffer from several biases, typically distorting their results. A previous article on the population of an Italian province, correcting the “immortal time bias”, showed worse results for the all-cause death of the vaccinated compared to the unvaccinated."
"This article highlights the “case counting window bias”, that considers the vaccine recipients “unvaccinated” usually for 14 days, a time interval reputed necessary to express the vaccine immune response."
Classification bias and impact of COVID-19 vaccination on all-cause mortality: the case of the Italian region Emilia-Romagna
https://www.tandfonline.com/doi/full/10.1080/08916934.2025.2562972#abstract
Vaccine Bias exposed: Deaths misclassified!
https://www.youtube.com/watch?v=3bWJEFZEsko
Att diskutera: Varför klassificerade man felaktigt vaccinerade som ovaccinerade?