my wife and i both have health issues.
she has COPD, and i have MS, along with peripheral nephropathy.
we have been VERY LUCKY [so far !] to have not gotten it. however, we take way more precautions than most, trying to avoid catching it.
that includes [the] extra vitamins as mentioned, plus [for better or worse] we have gotten all the vaccine shots to date.
also included is hand washing a bunch with disinfecting, anti-bacterial type of soaps.
being old, we don't go out much anyway, so i don't know if that helps or not............
all the precautions aside, if by chance we do get it, hopefully it won't kill either of us !