This article discusses James Van Praagh’s experience on the talk show The View, where he gives Barbara Walters a message (off camera) that she should check on her white blood cell count. She checked it out and nothing was wrong, so she told her audience the day after that it was ridiculous and what he did “was dangerous”.
Barbara Walter’s white blood cells are fine right now, but it does not invalidate the message. Time is a funny thing, it could happen later, or it might be someone she knows, rather than herself – things like this can happen in the context of mediumship, and it’s not necessarily a reflection on the medium’s capabilities.
As a medium and/or healer, you have to be very careful to not appear to be diagnosing, as the medical community, the seeker, or audience members could get you in trouble, depending on the laws in your area. It seems that Van Praagh directed her to her doctor, which is what a medium should do with this kind of information, which neatly avoids the issue.
At the same time, I can relate to Barbara’s statement that it’s dangerous. The danger comes from mediums who are either unaware, or don’t care about the consequences. As a medium, there are (at least) three considerations to keep in mind. The law, as what you’re doing may be, or could be construed to be, illegal. Ethics, because mediums should have high ethical standards, and appearing to be something you’re not violates that. Unintended consequences, as the “advice” you have may actually hurt the seeker more than it helps.
By the way, the article also covers some background on Van Praagh that you might find interesting.