It doesn't matter if 1% is "optimistic" or not. 20% infection + 1% best-case fatality rate is enough to knock the health care system and begin knocking out the

It doesn't matter if 1% is "optimistic" or not. 20% infection + 1% best-case fatality rate is enough to knock the health care system and begin knocking out the whole of society. Basically, there's enough information currently to tell people who pay attention and consider rationally that we need to spend every possible effort confining infections and quarantining, basically the entire earth. There is no alternative.