I don’t know how much that would have avoided the problem. My stepmother is a faithful vaxxer, getting the original shots and all the boosters. But she still got a full-blown case of COVID early this year that lasted several weeks.
Data from hospitals has shown that on average vaccinated people had less intense attack of covid, and recovered sooner than unvaccinated patients. But vaccine does not and can not prevent infection. Because airborne virus like covid has free access to lungs when inhaled. There is no virus proof filter in the nose from the vaccine.
My wife and I both got exposed to covid in her cancer clinic. We both came down with symptoms on Friday evening. We used the home-test-kits and both were positive for covid. All day Saturday we were real sick with cough, some fever, feeling seriously tired, and body ache. We had no covid medicines at home. So just stayed in bed all day Saturday. Waking up on Sunday morning most symptoms had disappeared except dry cough lingered for a few days.
Both of us had 4 jabs before. Was it the vax responsible for the fast recovery? No way to know. But it was a huge relief to recover so quickly without needing medicines or hospital.