Sweden, about the size of Michigan, followed the 'herd immunity' approach. They have had a lot fewer deaths than Michigan. Herd immunity will be the only way covid-19 will be defeated, short of a vaccine. A vaccine may take a while to get to market anyway. I believe I had covid-19 already, back in February. I won't know until I take an antibody test.
Interestingly, smokers seem to have a resistance to the infection.

Allen