I am a medical professional. You should check your state guidelines; however recommendations are if you are fully vaccinated you can go out in public. If you are unvaccinated you are supposed to isolate 5 days, and the CDC recommends that you wear a mask at home around people with covid. Frankly, if you're vaccinated and don't want to get covid you should stay away from your father either way. In reality, people are not really isolating from teh general public if they have a contact unless they care a lot. Remember there are oodles and oodles of breakthrough infections with omicron; so use that to guide your decision making.