Rob is making good sense here: "The math on what's needed for herd immunity is quite simple as math goes, depending on transmissibility, and standing now at about 80%. Whatever this percentage is does not change the logic here." For those for whom "math" is scary territory, I saw a great visualization in the Washington Post that allows you to see the curve as it develops: https://www.washingtonpost.com/graphics/2020/world/corona-simulator/ cheers, James