there's only 2 ways to catch the cov

1. catch a cold, flu, strep throat or similar [mild] respiratory ailment then be exposed to someone with covid (doc/hosp waiting room increases odds)

2. get vaccinated then be exposed to someone with covid

other than that covid can not by itself infect you - it needs a separate vector.

that's why people with other issues going to hosp nearly always catch the cov

it's why they don't really like the vax-or-test entry rules and force change to vaxed-only (it only reinforces the unvaxed AREN'T getting it)

simple rules of thumb

if you catch flue/cold or similar don't go out - tell the boss your self isolating

avoid hospital emergency rooms unless you really really need it, take panadol and stay in bed, use superglue on that cut if it's not that bad.