Hmmm… I know that we don’t pasken from a story, but I recall a chapter in A House Full of Chessed where Rebbetzin Machlis kept bringing her baby to have his bilirubin tested so he could have his circumcision on the eighth day, and miraculously his levels fell to an acceptable number just in time.
But my point is: If your doctor tells you to do something then you listen to your doctor. Have any of the people who refuse to wear masks asked their doctors for input?