Reading these sentences makes me doubt myself but I feel that statements 2 & 4 are not correct. Statement 1 and 3 seem valid to me, although there are slight differences in meaning. Statement 1 suggests if you are currently vaccinated. Statement 3 suggests if you have received a vaccination in the past (regardless if you are currently vaccinated or not)

I think all but No. 2 are correct but only 1 and 3 would be commonly heard. No 2 should be "had"

Like Kevin, I find that (as a U.S. native speaker) I am not quite certain about 2 and 4. I think they are all correct. I believe that #4 _is_ perfectly correct. It suggests that John wants to know if your vaccinations are up-to-date and you are still immune. "Are you vaccinated?" "I am vaccinated against pneumonia, but I am not vaccinated against smallpox." As evidence that this use is accepted, I see that a travel websites says "Although you're not at risk of getting yellow fever in Guatemala, you must be vaccinated if you're traveling to Guatemala from a country that carries the yellow fever virus... Any children under the age of 1 traveling to Guatemala must be vaccinated." #2 makes me stop and think. It sounds a little odd the way you've phrased it. However, this sounds correct to me: "John noticed my positive tuberculin test and asked, 'Have you ever been vaccinated with BCG vaccine? That can make you test tuberculin-positive.'" #1 would fit in this context: "I told John that I was going to the doctor for my annual physical, and I might be getting a flu shot. When I got back, John asked me if I was vaccinated, because he was going to the Senior Center to get his flu shot, and if hadn't already gotten mine, I should come with him." The same context would work for "had been:" "I told John that I was going to the doctor for my annual physical, and I might be getting a flu shot. When I got back, John asked me if I had been vaccinated, because he was going to the Senior Center to get his flu shot, and if hadn't already gotten mine, I should come with him." "Was" puts the emphasis on your state right now. Are you delighted, are you fed, are you vaccinated? "Had been" put the emphasis on an action that took place in the past, and puts it in relation to some other period of time in the past. "I told John I had been vaccinated during the period of time when I was at the doctor's getting my annual physical."

Hi Ana These are all fine to me. I don't see a problem with no.2.