I have been theorizing that the reason the US has had the most deaths from COVID has been because our population is mostly obese. Of course there are other failings, such as people being uninsured and as a result not wanting to go to hospitals. Or people not wanting to wear masks or take vaccines. But when obesity triples the likelihood of being hospitalized, it's no wonder that the US suffered the greatest death toll from COVID. [1]

[1] https://www.cdc.gov/obesity/data/obesity-and-covid-19.html