I got it again. I presume it's BA.5. Feels a bit worse than in February, but not too bad (like a head cold, only slightly elevated temperature, no breathing difficulties, sense of smell/taste seems ok).
I got it on a shuttle bus on the way to the airport. There was a sick person in the row behind me who had a bad cough and did not wear a mask. I did, but apparently when being directly exposed like this even FFP2 only works for about 15 minutes (because it only stops ~95% of the particles), after which you have accumulated enough virus particles to cause an infection.
This time I'm taking magnesium, vitamin D and some ibuprofen, which seems to do the trick.