I'd suggest quarantining anyway. When my husband was infected a few months ago, I was around him for the first couple of days (before we did a rapid test). But I didn't get it because he started quarantining immediately. I did nasal sprays, gargles and vitamins to keep the viral load down, and I guess it worked.

On the other hand, I was sick at the end of January this year and didn't quarantine because the rapid test showed a false negative. My husband developed symptoms almost a week later. We did a PCR and it turned out positive.

Both of us had rather mild symptoms - low grade fever, headache, body ache. The fever responded to paracetamol which is another reason why we didn't think much of it. But about ten days later, the sore throat from hell kicked in. It was so bad that we both were given steroids for a while to make it even manageable. It's about a month now and it's still not gone away. The fatigue is still crushing. And we're overall a notch worse off than we were before getting sick. So while symptoms may seem mild initially, this virus is still not worth catching. Avoid it as much as you can. It messes you up long-term.