Anyone. (not just Christians) The most successful 'healer' in history in the United States of America clearly stated that it did not matter if someone believed it worked, rather if they did what he told them, it worked. This stood the test of decades, and thousands of his 'clients'...
Only three out of ten thousand did not repond well to his method. There were others also who had similar results -- IF people DO what is right, they (almost always) recover, and with no bad or negative side effects, etc .... (realize they may well be attacked or persecuted for doing what is right, exactly as Jesus is/ was/ and said we would be) ....
FINDING out what is right to do, requires searching "outside the gates" with Jesus... (i.e. unauthorized)
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How viruses work was known well decades ago. Most is not allowed nor welcome by "medical teams endeavouring to understand" today. Nor by the ama, fda, pharmakeia, and governments of this world. (except in private)
i.e.
Coronavirus: How to Boost Your Immune System and Protect Yourself - Ann Louise Gittleman