> This might partially explain why the US has worse outcomes for COVID-19 than some other nations, and it may also explain the distribution of which demographic

> This might partially explain why the US has worse outcomes for COVID-19 than some other nations, and it may also explain the distribution of which demographic groups are more at risk for COVID-19. I think this is true and adds to a list of other things: obesity and cross-reactivity through exposure to viruses (I've been reading ppl suggest that Asia may have exposure to other SARS-like viruses).