Two points: a) Age is just a confounding variable. Covid seems to be a "cardiovascular" viral disease rather than a "respiratory" one. For the vast majority of

Two points: a) Age is just a confounding variable. Covid seems to be a "cardiovascular" viral disease rather than a "respiratory" one. For the vast majority of people Covid is unpleasant but not at all dangerous. Figuring out the real factors that make Covid dangerous should have been top priority, but unfortunately it isn't. b) Flu and "common cold" is, in fact, very dangerous and deadly. We just classify those deaths differently, e.g., as deaths from stroke even though strokes can be caused directly by the "common cold".