Illnesses of both minor and major proportions, occurring in
ourselves or in our loved ones, has always brought us to question Hashem's part
in both the cause and cure. As humans, with our extremely limited view of our
own reality, let alone that of Hashem, we can only question WHY?
There is, of course, an answer to that WHY but we do not have it within our
scope to know it and, because of that, all we can do is petition Hashem to
intervene and, having done that, come to an acceptance that this, too, is part
of the Master Plan. Every illness, along with the usual and obvious; pain,
grief, anger, etc., if we allow for it, also becomes an inspiration to perform
the research and investigations to cure or prevent it from happening to others.
I hope that I have, if not answered your question, given you an insight into how
faith in and acceptance of G-D's ways can make our days on earth somewhat easier
and more meaningful.