Dh and Dd haven't.
Both have done several covid tests over the year or so and all negative throughout.
They didn't catch it when I had it last year, despite me being pretty ill with, including a hospital stay. We didn't isolate at home abd Dh still slept in the same bed as me.
No idea how Dd has avoided it as she has been in contact with it so many times through me, home friends, at university and more. Plus she has been to festivals, bars, nightclubs and holidays abroad.
Dd has done a couple of antibody tests but all were negative. Last one she did also looked at vaccine antibodies which came back positive - at the time she'd had two vaccines, so expected results.
I almost certainly caught it at school (infant school, 3 form entry) from a pupil. I teach right across school and come into close contact with 270 children a week. Approx 80% of our staff have now had covid - mostly last autumn term, remainder of those who've had it were this autumn term. Several parents and pupils have had it - again mostly last autumn term and this autumn term.