Herd immunity will be reached at a percent of the population being infected. What percent that is depends on a lot of factors, including the rate of infection (

Herd immunity will be reached at a percent of the population being infected. What percent that is depends on a lot of factors, including the rate of infection (R0), the length of contagion, etc. Nevertheless, herd immunity will be reached at less than 100% infected with Covid-19. I'm not saying that it will be as low as 60%. I highly doubt that. I'd say closer to 80-85%, as a guess based on my simplistic math. I'm no epidemiologist. Then again, neither are you, I'm guessing. :) Months ago there was a fascinating link on HN that had models you could play with to adjust all the variables in a simple model. You should find it and play around. I'll try to find a link when I can come back to this later.