Medical reasons have already been widely discussed for COVID, medical inability is one of the protected groups for others getting the vaccine.
I think k you might be confused, it's not "moral and religious" it's a "moral basis of religion". Tell me what religious exemption you're claiming and I'll tell you everything else you'll have to start depriving yourself of due to religion.
Or read this, breaks it down fairly easy.
Morality is not subject to the CRA, even though it is an attempt at legislating it.