Issues have been raised as to whether studies have been biased against finding adverse reactions.<ref>https://childrenshealthdefense.org/defender/pfizer-covid-vaccine-trial-pathogenic-priming/</ref> | Issues have been raised as to whether studies have been biased against finding adverse reactions.<ref>https://childrenshealthdefense.org/defender/pfizer-covid-vaccine-trial-pathogenic-priming/</ref> |