Verb conjugation of "immunisieren" in German

All people held signs with names on them and on one plate I saw name, of course misspelled. I went with the person to his oldtimer car. We drove to his cottage and I was surprised about the nice reception.
We had time to walk around the waterfall but refrained from entering the little lake at the bottom. My fellow tourtakers were quiet nice and we spend a while just sitting in the grass near the water.
We then went out to have a drink at a bar near the hotel. There were mostly foreigners at the bar. All in all, we had the impression that there were many Westerners living in the city which gave this mix.