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One of the base assumptions of this trial is that it takes 10 days for immunity to develop following vaccination. While it's true there were 16 cases in the delayed group, 12 of these developed before they were vaccinated, and the other 4 at days 0, 2, 6, and 6 following vaccination, which is within their window (10 days) before immunity develops. Had anyone developed an infection 10 days or more following vaccination in either group, they would not be claiming 100% effectiveness.
That said, the vaccine is not 100% effective, they never are, but at this point, it is still statistically 100% effective.
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[–] DrRedbeard 0 points 1 point 1 point (+1|-0) ago
One of the base assumptions of this trial is that it takes 10 days for immunity to develop following vaccination. While it's true there were 16 cases in the delayed group, 12 of these developed before they were vaccinated, and the other 4 at days 0, 2, 6, and 6 following vaccination, which is within their window (10 days) before immunity develops. Had anyone developed an infection 10 days or more following vaccination in either group, they would not be claiming 100% effectiveness.
That said, the vaccine is not 100% effective, they never are, but at this point, it is still statistically 100% effective.
[–] oooooo ago
Thank you for clearing up my misunderstanding.