Here’s how they get the 95% rate. Like the PCR non test, it’s a meaningless improvement over doing nothing. Link
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The Pfizer control or placebo population had a 0.8 percent chance of becoming a covid-19 “case” within 105 days. Subjects in the placebo group had a 99.2 percent chance of being covid-19 negative for 105 days. The vaccine reduced that 0.8 percent chance for becoming a covid “case” by 95 percent to 0.04 percent. This is where the 95 percent efficacy figure comes from. On average it took 122 vaccinations to prevent a single “case” of covid-1 9. It is unclear whether the vaccine will protect against hospitalization. There were more hospitalizations in the control group than in the vaccine group, but the numbers were too small to be statistically significant . If the numeric trends continued for larger numbers of subjects, it would take over nine thousand vaccinations to prevent a single hospitalization. There is no evidence for a mortality benefit from the vaccine at this time. Up to 45 percent of subjects receiving both doses of vaccine will require medication to treat systemic side effects . Based on the evidence to date, I will take my chances with the virus rather than risk the known and unknown side effects of this vaccine”