My thanks too.
Has an Ro for Delta been established? All I've seen are estimates such as "possibly 225% faster spread than the original strain". But, that's subject to many factors in both directions (vaccines, acquired immunities, less mitigation, etc.)
“Has an Ro for Delta been established”
Freeper 2AProtectsTheRest has spoken to that in the past.
2A, would you be so kind as to comment on the Ro of Delta?
I think PaulR’s question also is looking at particular factors that might influence that (and thereby Herd Immunity Threshold) in the USA particularly (e.g. which vaccines are used, amount of immunity through exposure, cross immunity, mitigation measures like social distancing, population density, or others). But the established Ro for Delta is the main question.
My recollection is that the original strain needed about 60% of the population immune, for herd immunity threshold, but is more like 80% for Delta.
At the time I heard that, there were caveats, that the Delta Ro was not precisely quantified. Maybe by now, it is better measured.