CDC’s Vaccine-Efficacy Epidemiologic Incompetence
Periodically during the Covid-19 pandemic, CDC scientific staff have employed their available studies’ data to estimate the efficacy of current or recent versions of Covid-19 vaccines to reduce risk of testing positive for Covid-19. While the fact of “testing positive” has been somewhat controversial because of the secret PCR Ct threshold numbers involved that have allowed for uninfectious people with unrecognized Covid-19 from some weeks in the past to remain test-positive, my goal here is to illustrate CDC’s problematic epidemiologic methods that have substantially inflated the vaccine efficacy percents that they have reported.
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