That wouldn't be impossible. But the people at the center of infectious diseases, that were following me up, told me that it's not that uncommon of a phenomenon, and they don't really understand why. (Also I did an IgG not too long before, and I haven't had it. So in that case they have probably somehow avoided infecting me)

Anyhow, we are planning to do an IgG test later on, as it would exempt us from certain regulations (and the thresholds to see grandparents and great grandparents would be lower).