A Co-worker of mine recently died of cancer, before that there was a long period within which she clearly had a different deal then most of us, but generally it

A Co-worker of mine recently died of cancer, before that there was a long period within which she clearly had a different deal then most of us, but generally it was not known that she had cancer. As I understood it she was not legally required to disclose the illness to her employer (Germany), nor was her employer legally allowed to ask.