Miracles or miraculous occurrences pertaining to health do or do not happen depending on which God you followed.
For example, if we're talking about the Catholic God, chances are you depended on doctors and their knowledge of medical science for all your medical problems.
Similarly, if we're talking about the Muslim God, chances are you depended on doctors and their knowledge of medical science for all your medical problems as well.
Ditto the other gods, be they the Hindu God, the Buddhist God, the Jewish God or any other known god, and in some cases you probably depended on witch doctors for their help and expertise as well, when all else fails.
The Judeo-Christian God, however, during the time of his son, Jesus, on earth, performed all kinds of miracles. For instance, the lame picked up their mats and walked; the blind opened their eyes and saw; the mute opened their mouths and talked; even the dead woke up and reclaimed their places among the living, all of which would have been deemed impossible by doctors and medical science.
You see, the thing is, miracles or miraculous occurrences pertaining to health do happen. All the time.
If. You. Believe.