HereâÂÂs the link for the source: https://www.fda.gov/media/144245/download
I just don’t see where this writer is pulling stats like that. I’ll leave the question open and unanswered. I speculate that between the two vaccines probably building antibodies thus the positive test for the virus. Possibly found the answer p42 on FDA pdf:
“It is possible that the imbalance in suspected COVID-19 cases occurring in the 7 days postvaccination represents vaccine reactogenicity with symptoms that overlap with those of COVID-19. Overall though, these data do not raise a concern that protocol-specified reporting of suspected, but unconfirmed COVID-19 cases could have masked clinically significant adverse events that would not have otherwise been detected.”