Some time ago, the validity of covid certificates was reduced to 270 days. The undersigned received the third dose on October 11, 2021, i.e. more than 270 days ago, and his certificate is therefore invalid by law. The undersigned works full-time (and even more so) in constant contact with dozens of patients. Many healthcare professionals are in a similar situation, many of them even more vulnerable as they directly serve Covid 19 patients. So what? And nothing. No vaccination of these people. And everyone should be vaccinated before the certificates expire. There were probably some reasons for reducing the validity of these certificates.

As the classic used to say: "the doctor can handle it if he wants to", but in this situation he shouldn't be able to deal with it, but it should be dealt with systemically.

And this applies not only to medical professions, as you work in similar exposure in other professions.

And as the icing on the cake: if someone with an invalid certificate would like to fly to the United States, let it go straight away.