Australian scientists think AZ vaccine may not help attain herd immunityhttps://www.smh.com.au/national/scientists-call-for-pause-on-astrazeneca-vaccine-rollout-20210112-p56tjt.html …
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Thanks, that's very useful. The article says something about a vaccine needing to be atleast 70% effective to prevent significant transmission, but I guess the 70% they are talking about is different from AZ's 62% (in that, the latter is efficacy against symptomatic disease)?
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That's a reference to the herd immunity threshold for COVID-19. Any vaccine would need to prevent at least 60-70% of all onwards transmission to reach the threshold
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