A 95% vaccine efficacy does NOT mean 5% of people who get the vaccine can still get COVID. The efficacy is based on a comparison with the control group. I am begging journalists who write about vaccines to develop basic statistical literacy. I am losing my mind.
To clarify: ~1% of people who got the Moderna or Pfizer vaccine got COVID. None of the people who got covid after the vaccine had to be hospitalized with severe covid.
A tweet about vaccine efficacy is my most popular tweet in months... 
Dozens of ppl are in my mentions asking questions and/ or making criticisms of the studies that indicate you don’t know much about stats or experimental design. I don’t have time (nor am I qualified) to teach you about it, but this a good place to start: en.m.wikipedia.org/wiki/Statistic…
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