with nothing more than an ad hominem attack?
He was referencing a peer reviewed study:
This study was large and well-conducted. It used a database that covers 85 million Americans in 63 health-care organizations. It was published Oct. 5 in World Psychiatry, a peer-reviewed journal. People were included if they’d had no Covid infection before vaccination and had been “fully vaccinated” - that is, 14 days after the second dose.
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You can view it here:
https://onlinelibrary.wiley.com/doi/10.1002/wps.20921