The study has several limitations. First, it is not peer-reviewed. It does not consider factors such as the spouse’s occupation, the presence of children at home, the actual work environments of participants, or whether individuals held additional jobs.
Furthermore, the effectiveness of the vaccine depends on the specific flu strains circulating at the time. The study began when the vaccine was first rolled out, yet it typically takes about two months for full immunity to develop.
It also has a testing bias: vaccinated individuals were more likely to get tested for the flu. Meanwhile, some unvaccinated individuals may have already contracted the flu before the study began or during previous seasons, which could skew the results.
The study also did not assess the severity of outcomes, such as hospitalisations or long-term effects caused by the virus. It excluded data from people who self-isolated or used home flu tests.
Lastly, behavioral differences flu history between vaccinated and unvaccinated individuals were not addressed, particularly in terms of their likelihood to seek testing or modify their behavior after receiving the vaccine.
https://www.medrxiv.org/content/10.1...450v1.full.pdf
TBH It's a better study than most that particular conspiracy idiot normally presents, granted, but it is not being used as the author's intended unit to be.
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