Can I then conclude that a vaccine is not necessary if you have already had covid? The chance of reoccupation is already small and suppose it happened, the chance of serious turnover is minuscule. what is the added value of vaccination?
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Variants.
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Isnt reinfection dangerous?
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Yup that’s how viruses mutate.
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how contagious are you after being infected for the second time?
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“In the alternative cohort analysis, among those aged 65 years and older, observed protection against repeat infection was 47·1% (95% CI 24·7–62·8). “https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(21)00575-4/fulltext …
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This study also wasn’t delta, it was alpha/beta. The population was mainly under 50. Just a lot of caveats that should be stated.
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Meaning, there was no need to vaccinate against c19. Herd immunity wouldn’t have created mutant variants (vaccine escape pressure) which turned out to be much, much, deadlier.
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, PhD Mill Hill London
and lab Cambridge