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A comment on The mutation that helps Delta spread. Parent comment

Re:The mutation that helps Delta spread by tunesmith on Tuesday August 24, 2021 @09:39PM (#28297185)
No, R0=6 is a given. I'm not calculating R0. R0 for Delta is estimated between 5 and 9.5. I picked 6, just for illustration. Given a starting R0 and a vaccination rate and a vaccine effectiveness, that is how you can calculate effective Rt. There's nothing circular about that.

There's no such thing as "R0 within a vaccinated community" - R0 is the starting reproductive number. Effective reproductive number - given various mitigation measures like vaccination, masks, natural immunity, etc - is Rt.

You can try the calculations using any other starting R0, from 5 to 9.5 if you stay consistent with estimates of Delta transmissibility.

The point is that it's possible that a group of vaccinated people would never have an Rt below 1 from vaccination alone, simply because of the limited vaccine effectiveness against transmission.

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Re:The mutation that helps Delta spread by colordrops on Wednesday August 25, 2021 @05:33PM (#28307343)
If one population spreads a disease more than another, it makes absolutely no sense that R0 is a constant across all populations, by definition. Perhaps you should look up the meaning of R0.
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