Did you know that science has progressed to the point that you can get your blood checked for antibodies against COVID19 and if those antibodies are coming from vaccination or infection? I do this check once a year. And the results are in. Still vaccination only. My regimen of #WearAMask and avoiding risky situations seems to work. Next year I'll order the test again. In Germany it costs around €50-75, depending on the lab. Ask your doctor to get it done. That's how I did it.