One way you can bring it down is with vaccines Another is by having everyone get the disease
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So, we know that if R drops below 1, the disease stops spreading Therefore, we want to know what proportion of the people in the population need to be immune to the disease for R<1 This is the herd immunity threshold
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The formula is pretty easy: R0×%immune<1 Therefore, 1/R0 = herd immunity threshold
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For
#COVID19, R0=~2.5 Therefore, 1/2.5 = the % of people who need to be immune for the disease to be contained In this case, that's 0.4, or 40%1 reply 4 retweets 18 likesShow this thread -
I.e. if 40% of people get
#COVID19, the disease will probably stop depressing by itself (as long add it confers lasting immunity)2 replies 4 retweets 21 likesShow this thread -
Similarly, if enough people self-isolate, or if social distancing reduces the effective reproduction rate low enough, the disease may stop spreading However, this is not herd immunity
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Apologies, mistake in the number above It is 1-40%, or 60% who need to be immune for herd immunity given this R0!
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(This is why you shouldn't tweet and play Borderlands 3)
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Also, good to note that herd immunity requires a LOT of people to get infected If 60% of the population gets sick, and 1% of the cases die, that's 0.6% of THE ENTIRE POPULATION dead In the UK, that's millions of people
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Replying to @GidMK
Isn’t 0.6% of the UK population around 400,000 people? (Assuming overall pop. around 66-67 million? Still very serious numbers, but not in the millions. Or did you mean millions would get infected?
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Yes actually that's correct
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