Now my question might be an unusual one. When you are to get a vaccine, the doctor checks you if you are not ill or anything, as it's important for development of anti-bodies. Now, I heard that steroids could have an impact on the immune system. I'm off now, but I want to start TRT soon - 100mg Test C per week. Do you think it could have a negative effect on the immune system and mess with the vaccine protocol? I know, I know, I can ask the doctor, but I'm not sure if the doctor is going to know the answer, or most likely will be overly cautious - as he/she should.