Vaccine efficacy of Pfizer-BioNTech in Denmark 🇩🇰 for >=7 days after 2 doses:
📍53% in Long Term Care Facilities
📍86% in >=65 years needing homecare
📍77% in >=85 years old
📍80% in frontline healthcare workers
📍73% with #COVID19 high risk factors.
medrxiv.org/content/10.110…
📍53% in Long Term Care Facilities
📍86% in >=65 years needing homecare
📍77% in >=85 years old
📍80% in frontline healthcare workers
📍73% with #COVID19 high risk factors.
medrxiv.org/content/10.110…
2) For hospitalization admissions overall, 93% efficacy with 2 doses. But 75% efficacy for hospital admissions among those living in long term care facilities.
3) For #COVID19 mortality, 94% efficacy with 2 doses after 7 days. For long term care facilities residents, 89% efficacy against covid mortality. 97% for >=65 needing homecare.
Also interesting 49% efficacy against all-cause mortality!
Also interesting 49% efficacy against all-cause mortality!
4) But another way to look at this Danish CDC data it is the much lower efficacy after 1 dose. One dose clearly isn’t enough protection, especially for variants. And this study was mostly pre variants. One dose strategy countries like Canada 🇨🇦 clearly not adequate.
5) Note, the negative efficacy in the first 14 days is likely due to close monitoring and surveillance testing in those vaccinated, says many fellow epidemiologists. Closer monitoring in one group versus another is a classic example of epidemiology surveillance bias early on.
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