https://www.mirror.co.uk/news/world-news/first-recovered-coronavirus-patient-italys-21728260
My feeling is that the skew of lethality towards old people, is mostly because they are generally less healthy and have more existing medical issues.
One concern I have about the preventative measures ( staying indoors and avoiding people ) is that we may develop more of the conditions that either make us more affected by the virus, or are lethal in themselves. "Sitting is the new smoking. "
The good news seems to be that outdoor exercise is OK, so all the gym enthusiasts will just have to adapt. At the risk of sounding like Captain America to Black Widow, less traffic will mean less air pollution and less risk of being run over.