To be clear, it requires R < 1, not R0 (which is the initial rate of spread). More importantly though, we don’t really need herd immunity - once everyone has ha

To be clear, it requires R < 1, not R0 (which is the initial rate of spread). More importantly though, we don’t really need herd immunity - once everyone has had a chance to get vaccinated, the virus ceases to be an issue, as contracting covid is no different from contracting the cold or at worst the flu.