My brother is obese, diabetic, alcoholic, has kidney problems, and a few other health issues and weathered Covid just fine. He was over it in a few days and did not need hospitalization.
A relative in their 80’s and previously a heavy smoker succumbed to it after some time in the hospital. I don’t know if they vented them, but probably, but at 85, stuff happens. And likely damage from years of smoking played a role.
“My brother is obese, diabetic, alcoholic, has kidney problems, and a few other health issues and weathered Covid just fine. He was over it in a few days and did not need hospitalization.
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There are a lot of other factors. We learned early on last year that the DOSE of infection has a huge impact on the severity of the result. so your brother could have had a very low exposure.
Vitamin D seems to be a factor. The majority of the population is deficient. The southern states seem to be weathering the virus better than the northern states.