important piece re: pfizer vaccine.https://twitter.com/GidMK/status/1326304265304903680 …
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?? Sorry, that doesn't make sense since it wasn't an exclusion criterion & differentiating between these people is a high-level objective of the trial.
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Wait now I'm confusing myself. The exclusion criteria specify that people with previous COVID-19 are not included in the studypic.twitter.com/ltxMvjIURJ
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(3) 7+ days after 2nd shot isn't exactly the same as 28-days (unspecified) & it's still not restricted to the people who were known to be Covid-free.