Vaccinated, one booster.
I'm extraordinarily healthy to begin with. Last got flu sometime in the 1970s and I don't bother with the flu vaccine. Heresy, I know. I'm 73 years old, and have gotten maybe two colds in the last ten years. I have gotten the two shot shingrix vaccine. I'm not a complete idiot.
I will say that during this entire Covid thing I've been completely dumbstruck by the huge variations in who gets it, who doesn't, who gets it a second or third time, how sick someone gets, who gets long Covid. I think the essential lesson is that individual immune systems are highly variable, and this is making that incredibly clear.
I might also suggest this. Various research has shown that people who get enough sleep tend to be far more resistant to disease than those deprived of sleep. I honestly wonder if Covid isn't making that even more clear, but I don't know. I will say that all of my life I have tried very hard to get enough sleep, and much of the time succeeded. In recent years, now that I am retired, I do get plenty of sleep. Lucky me. Perhaps it's part of why I haven't gotten Covid, although living alone, not working, not going a lot of places would definitely factor in here.