Earlier quoted context omitted.
Is that the one that makes you deathly allergic to beef or something?
Nope, you are thinking about alpha-gal allergy there. https://en.wikipedia.org/wiki/Alpha-gal_allergy They are talking about TBE (also known as "FSME" in german speaking countries) instead: https://en.wikipedia.org/wiki/Tick-borne_encephalitis
Thank you :)