That argument will always come first, the health industry rejects it. If it is tested and researched and the health industry does reject it, can we see some proof of the rejection? Anything at all, please? Can you come with examples of the research on the power of prayer? Please come with more than arguments and you shall be trusted.
Even no one will conduct these studies. No one needs to prove it. There must always be a confrontation between believers and atheists