16: Doctor Detective: Is it ok to tell a stranger they're ill?

As a doctor, you're trained and equipped with knowledge to diagnose various illnesses, just by sight. But where does the line stop and when do you stop being on duty? Would you (and should you) intervene with a stranger? At worst you could seriously offend them, at best you could save their life. Hear the doctors' opinions on that plus whether the covid vaccine should be compulsory and what a limp handshake could say about your liver.