Obesity. Covid literally attacks obese people. And obese people also are at huge risk. I'm overweight and I was literally frightened during covid. Now I lift weights every day and work on my diet very hard. But we are literally ignoring the elephant (literally) in the room.
It's worse than that: we are celebrating it Now I'm not saying we need to shame anyone, but saying "healthy at any size" is a terrible lie and in the long term helps no one.
I recommend reading the book, the entire point of which is about shifting one's health efforts from an exclusive focus on weight to a more holistic view.
I.e. even if you can't drop that last 20 pounds (and many people struggle to do so, especially as they age), you should still eat a healthy diet, exercise, limit alcohol intake and avoid smoking.