I'm not sure to understand what 90% means in this context.
We know that more than 80% of the infected people do not show any symptoms, and that around 0.5% (mostly elders) die from COVID.
Do the 90% addresses the death rate of those 0.5% ?
We know that more than 80% of the infected people do not show any symptoms, and that around 0.5% (mostly elders) die from COVID.
Do the 90% addresses the death rate of those 0.5% ?
So as it is written, it merely means that the from the vaccinated persons ("study enrolled 43,538 participant") in the distribution of the observed 94 "cases" diagnosed with COVID-19 it is seen that 90% of them are among the control group (among those who received placebo).
Note that the illness (as in "having symptoms") is called "COVID-19" and the test to the mere presence of the virus would have been formulated like "SARS-CoV-2 was not detected" and that's not what is written in the press release.
https://www.pfizer.com/news/press-release/press-release-deta...
Let's hope that the later information includes the tests to the presence of the virus, if it is at all regularly performed on the test subjects.