Here is an article dealing with that exact topic: https://www.stern.de/amp/gesundheit/corona--medizinische-gruende--die-gegen-die-impfung-sprechen---es-sind-nur

Here is an article dealing with that exact topic: https://www.stern.de/amp/gesundheit/corona--medizinische-gruende--die-gegen-die-impfung-sprechen---es-sind-nur-sehr-wenige-30690844.html https://www.stern.de/amp/gesundheit/corona--medizinische-gru... Its in german, but tl:dr: There are very few conditions that would actually prevent the vaccination, it essentially boils down to very specific allergies or early stages of pregnancy.