Delaying a Covid vaccine’s second dose boosts immune response

Re:Delaying a Covid vaccine’s second dose boosts immune resp... by eightysixfour on Friday May 14, 2021 @07:11PM (#27160633)

Do you have a source for this number? All of the evidence I've seen shows the mRNA vaccines are in the 80% effectiveness range after a single dose, but that data was not specific to any variants.

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Re:Delaying a Covid vaccine’s second dose boosts immune resp... by UncleOxidant on Friday May 14, 2021 @07:53PM (#27160907)

One study from Qatar: https://www.nejm.org/doi/full/10.1056/NEJMc2104974

    For preventing infection:
    B.1.1.7: 29.5% effective after one dose (Pfizer) 
    B.1.351: 16.9%

See Table 1 there for more details.

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Re:Delaying a Covid vaccine’s second dose boosts immune resp... by eightysixfour on Friday May 14, 2021 @08:58PM (#27161277)

Would have been really nice if they had separated the effectiveness data by days after first dose, we know the curve is substantial for the first few weeks so it would not be surprising for people to still catch it in week one, I would be surprised by data showing <50% effectiveness in week three and four.

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Re:Delaying a Covid vaccine’s second dose boosts immune resp... by eightysixfour on Saturday May 15, 2021 @07:13PM (#27169798)

Canada has some opposing data: https://www.cdc.gov/mmwr/volumes/70/wr/mm7020e2.htm

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Re:Delaying a Covid vaccine’s second dose boosts immune resp... by graeme on Saturday May 15, 2021 @08:48AM (#27164721)

I believe the author said people were misinterpreting the study. It included people who caught it before the protection of the first dose kicked in.

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