Pfizer: Our COVID-19 vaccine is 90% effective. Also Pfizer: The analysis involved *94* subjects, and we’ve provided zero data.https://www.businesswire.com/news/home/20201109005539/en/%C2%A0Pfizer-and-BioNTech-Announce-Vaccine-Candidate-Against-COVID-19-Achieved-Success-in-First-Interim-Analysis-from-Phase-3-Study …
Based on the preregistration, the only "efficacy" primary outcome is confirmed COVID-19 infections. Symptom severity, hospitalization etc are all secondary outcomeshttps://clinicaltrials.gov/ct2/show/NCT04368728?term=biontech&cond=covid&draw=2&rank=4 …
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Gideon: You should look over their vaccine protocol rather than the CT page. The efficacy assessment involves both mild and severe cases, and the interim analysis allows for reporting on severe cases. https://pfe-pfizercom-d8-prod.s3.amazonaws.com/2020-09/C4591001_Clinical_Protocol.pdf …
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Regardless, the company could have explained the difference in their news release, and news reports could do a better job of explaining the context.
End of conversation
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