I have heard of praying for people, not about healing people without faith.
Later the most successful healer in the usa historically as far as I know might be seen. (He passed some years ago).
He did not usually pray a prayer of faith to heal them. (He did pray frequently every day).
He tested them, found out what was wrong, and told them what to do to get better.
If they listened, they got better.
If they did not listen, they got worse.
It did not matter if they had "faith" in Jesus or not, concerning who got better and who did not.
Even if they did not "believe" it would work , if they did as instructed, they got better .
As simple as that. Others more recently have had very similar results - sometimes without testing, but just doing what was good for their immune system/ body/ mind/ blood stream/ gut. Recovery happens frequently,
or people "stay healthy", doing what is right, even if they don't realize it until they do something 'wrong' and get sick from doing it. (happened to a friend a few months ago- they 'knew' not to, but did anyway, and got sick for 2 days.... learned their lesson too, been getting better constantly daily except for those 2 days).