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Parts of the CDC's summary include: "Vaccine was 86.5% protective against symptomatic illness among residents and 87.1% protective among HCP." and "Although COVID-19 mRNA vaccines demonstrated high efficacy in clinical trials (1), they were not 100% efficacious. Thus, some infections postvaccination are expected.". So, even though the reported number of cases is statistically minuscule (so far) and even though this outbreak may prove to be an anomaly, using words like 'can't' and 'won't' when talking about the chances of a vaccinated person contracting Covid are just plain wrong. |
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Hey, he only "flips" according to his political view. |
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While the CDC report is still mostly reassuring, there are some troubling implications as well. If I'm reading the numbers right, 18 of the 75 vaccinated residents were infected, with 6 of them being symptomatic. |
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They are not the same number. The efficacy rate during the Pfizer trial was essentially the ratio of the positives of the test group and the placebo group. This ratio was 20 to 1, or 5%, and reflects the reduction in the probability of catching COVID if exposed. The number of breakthrough cases during the trial for the test group was 8 out of 21,000 or 0.04%, not 5%. The current CDC reported breakthrough rate (for the fully vaccinated) is probably undercounted at 0.008%.
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