3 ms·

Edit: Nevermind, I was wrong- apologies! https://www.forbes.com/sites/carlieporterfield/2021/07/21/study-finds-pfizer-and-astrazeneca-vaccines-effective-agains

• rsynnott 5y ago
  From the article you posted: > Two doses of the Pfizer vaccine had an effectiveness of 93.7% at preventing symptomatic alpha infections, and 88% for the delta variant. [..] > However, the effectiveness of the vaccines plummeted if a patient had only received one dose of either vaccine: the study found both to be just more than 48% effective against alpha and only about 30% effective against delta. I'm a little confused as to what your point is? The vaccines are highly effective after two doses, but not very effective after only one dose.
  • jaytaylor 5y ago
    I don't see 50% as "very little", but that's just semantics and not worth fussing over. I concede to you :) Thank you for following up- I appreciate it.
    • rsynnott 5y ago
      50% (48%) is for Alpha (I'm actually a little surprised it's that low; IIRC it was a lot better in the initial studies, though those were on the ancestral variant, not Alpha). For Delta, it's 30%, per that article. I'd call that pretty low. That said, other studies are available, and some have shown decent performance against Delta after one dose.
      • deleted 5y ago
        [deleted]