I'm still of a mind to say one of the best ways to deal with this is to recognise that everything about the way COVID19 spirals into complications is a wake-up call for a lot of us. If we are likely to get infected at some point, you need to be fitter just to be safe from having a horrendous time of it and ending up in hospital. It's not just pneumonia. Complications involving the kidneys, liver, and heart are commonly mentioned. And if you are unlucky and get to the stage where your immune system responses go critical, your entire body is going to be in a desperate fight.
Time to cut the sugar, white carbs. Cut back on beer/wine, lose a little weight. If you can give up smoking in any way, just do it, this and other diseases is so much more likely to leave you unharmed even if you've only given up for a few days. I need to give up the vape as well, get back on the niquitines.