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by HWR_14 1858 days ago
Wait, Pfizer is only ~75% effective against B.1.351? Can you provide a source. I was not aware of that and it's worrisome.
1 comments

https://www.nejm.org/doi/full/10.1056/NEJMc2104974

"The effectiveness against any documented infection with the B.1.351 variant was 75.0% (95% CI, 70.5 to 78.9). Vaccine effectiveness against severe, critical, or fatal disease due to infection with any SARS-CoV-2 (with the B.1.1.7 and B.1.351 variants being predominant within Qatar) was very high, at 97.4% (95% CI, 92.2 to 99.5). Sensitivity analyses confirmed these results (Table S3)."

so it's still quite effective at preventing severe illness, which is why I'm not terribly worried, but still spooky that strains are starting to mutate away from our protection.