Its possible it could be something else. It cant be Bronchitis, because I developed that later after a week. Doctor said a bacterial infection took advantage of my sickness. Didn't have Bronchitis or a cough in my first week. Pneumonia is close to C19 in symptoms. Hundreds of Rhinoviruses, Coronaviruses, Influenzas, are together what we call the Common Cold. C19 is just a new one.

As you said, its tricky identifying it. There's no way to be 100% sure, unless you ran 3 different kinds of tests and also sequenced the genes from my sample. I had: 1) Symptoms matching C19 rather than a cold - 3 weeks and going, while a cold is done in 3 days 2) PCR tests for me and GF came positive. I was extremely skeptical of PCR, because the inventor explained the problems with using it for tests. However, we took 10-15 PCRs over the last 2 years, and the ones we took 3 weeks ago were the only +ve result we ever got, both of us. All that could be wrong. But I think it was probably C19.

Friend's dad was 55 yrs. You are correct, 80-85% of deaths are above 80 yrs, and average death age is above life expectancy (in UK). I got raw data for past two years from Openswiss and checked it by hand. Before 50 almost no one dies, deaths slowly tick up after that. After 80, it skyrockets.