Thank you - really appreciated that analysis and particularly about the heterogeneity scenario. It always seemed to me it could only apply if groups are kept permanently apart - but once prevalence levels are high there's more chance of spread between groups
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Well-written and timely piece. Good to mention that herd immunity is not "immunity" in the sense of biology and that without vaccine, herd immunity does not make sense.
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I did not. In fact, I linked to a study that I co-authored demonstrating the age related IFR for COVID-19 is remarkably high even in middle age
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We should not talk about "herd immunity" as some kind of absolute protection. However, all kinds of heterogeneity are not that transient; spread among those <40 may be necessary to sustain an epidemic.https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0236237 …
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