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I think I am misunderstanding something. But wasnt the original Covid an R0 of 2.5-3? And Delta has an R0 of 7-8?

An R0 of 2 sounds like a really low infection rate in comparison, but then it's increasing rapidly and outcompeting delta? I dont get it.

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yes sorry you're right - I'm mixing something up here:

> We identified five studies, which estimated the basic reproductive number for Delta. Table 1 shows that the basic reproductive number for Delta ranged from 3.2 to 8, with a mean of 5.08 -- https://academic.oup.com/view-large/305057394

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