The compulsory vaccination in Austria has been decided, in Germany it is politically planned. What options are there to find out whether you can tolerate the vaccination against Covid at all? The entrepreneur Markus Bönig wants to help people to determine their individual ability to vaccinate. Or their inability to vaccinate. At least a preliminary one. After all, who can rule out that they are allergic to one of the numerous substances in the vaccination? Proof-Express is the name of his start-up and has been online in Germany for a short time.