I'm glad to hear that you and your husband are both doing well. And you are right that breaking a hip is a dangerous thing.
I have noticed that on the "
Memorial Thread - COVID-19 Coronavirus" many of the folks who have succumbed to Covid-19 are large. You can guess their weight just by looking at their photos. A good many of the non-elderly folks are obese.
I first noticed this two months ago when Italy was being hit hard. When photos of the victims were posted online it was apparent that many were overweight. Maybe science will figure out the reason someday.
The basic reason is already known. Anyone with higher BMI falls into this group (even if very muscular and not fat, however there are differences).
Your heart takes the oxygenated blood from your lungs and pumps it. Your heart has limits.
Your lungs are severely compromised in their ability to oxygenate blood by CoVid. Further, there are mechanisms by which CoVid attacks red blood cell capacity directly.
The larger the organism, the more oxygen it needs for all of its tissues to stay alive. The body doesn't really differentiate between organs, fat, nerves and muscles in its quest to send oxygen. So...if your lungs and heart have to pump oxygen to a larger organism, there's a problem if the system starts to fail. Your body needs more oxygen than a typical oxygen mask in hospital can supply.
I am not thin. So, my heart and lungs have to work harder if I run or if I get CoVid. I am not morbidly obese, either. I've lost a bit of weight recently (so my heart/lungs have a bit more capacity relative to what they did have - I need to lose more).
All of us who are overweight or obese should be using this quarantine time to change that - but I find it really hard to exercise (my exercise has been all the steps I take at work, I typically walk around campus just to look around and get some steps). I'm reluctant to go out in the neighborhood at this precise moment (feeling under the weather to start with). Ugh.
Fortunately, I have little appetite. Unfortunately, what little appetite I do have is not for healthy food. That's how it always is when I don't feel well. I don't think I have CoVid, I think I have allergies.