But Sweden has some things in its favor that we don't (at a country scale) in order to employ the herd immunity strategy. 33x less the population (if it takes Sweden a year to achieve herd immunity, it could take us a decade), 50 percent of their population already work from home, more single person households, only 1 city with over a million people. Trying to do herd immunity in the US would likely have us paying both the short term and long term prices. We just have too many people to achieve it over a year and a half until the vaccine hopefully arrives. We might be able to do it region specific. I see no reasons why places like Utah and rural areas can't carefully try the strategy. But New York, Chicago, LA, Houston, etc shouldn't be declared "open for business" anytime soon. The big cities might have to do like Singapore and alternate being relaxed and strict as the new case count dictates.