As with a great deal of health care regulation during the declared pandemic, changes were made to the VAERS system and also to safety signal analysis leading up to the experimental mass vaccination program officially targeting COVID-19. Without much fanfare, the CDC published a document on January 29, 2021 entitled Vaccine Adverse Event Reporting System (VAERS) Standard Operating Procedures for COVID-19. There is a lot to talk about in this document, but let us focus on Section 2.2, which begins on page 14. Here, the CDC states that, "A series of tables will be generated using the VAERS automated data," and that these, "will be refreshed daily for internal use," but "not for public release". One might wonder why the CDC would not want additional outside eyeballs on such data---particularly since it took them two full months to figure out that myocarditis was an issue with the vaccines despite Israel warning about it two full months before the CDCs scheduled, delayed, and finally held meeting in late June. Maybe the CDC should hire somebody to read the pertinent news?
We get to section 2.3, and this is where things get really crazy. This is where signals (for assessing safety/danger of the vaccines) get defined. Subsection 2.3.1 begins (emphasis mine),
CDC will perform PRR data mining on a weekly basis or as needed. PRRs compare the proportion of a specific AE following a specific vaccine versus the proportion of the same AE following receipt of another vaccine (see equation below Table 4). A safety signal is defined as a PRR of at least 2, chi-squared statistic of at least 4, and 3 or more cases of the AE following receipt of the specific vaccine of interest.
Only a real dork would emphasize the word 'and', right? A logic dork, mind you, but we'll get to that...
First, note that PRR is the proportional reporting ratio, and these PRR numbers are the outputs of a function defined by the CDC based on four variables (which they list in a table as capital letters, then apply in a function as lower-case letters, which always makes me a little uncomfortable as I rarely see such sloppy transition from definitions to application, and somehow they always seem to come from government documentation where I worry about ass covering and plausible deniability).
Look at the numerator of this formula. The variables a and b are specific to each vaccine. Now, consider what would happen if an extremely dangerous vaccine were introduced that resulted in 20 times as many AEs of all types as all the other vaccines to which it gets compared.
The PRR remains invariant in the scaling of adverse events!