Obviously that "friend" doesn't know what they are talking about. Do they really think you are on chemo drugs? Immunosuppressants are not radioactive. If you have MRSA (Methicillin resistant Staphylococcus aureus) or Clostridium Difficile or some other bad bacteria, then precautions should be taken with what people come in contact with.

Sounds like your friend has a really bad case of Ignorance. Now I personally would consider THAT dangerous.

Annie