Can it kill me or my sister or not?
Covid: yes (I have COPD)
Common cold: no
I don't even get common colds, in the last 8 years I have been sick once, and it was quite mild.
My sister is a different thing, that idiot still smokes though she is older than me and has got one stroke, or brain infarction, or. Influenza could kill her, but I cannot do anything to it.