When we say disease, it is 'dis'-'ease', which means not at ease. As the term denotes the disease, start at the mental level first and evolves itself to the physical level. The physical health describes a person in complete sense of well-being, energy and not suffering from constipation, or complaints related to urination, his breath having sweet smell. He should not be aware of any of the normal bodily function. His skin should have a healthy shine.
Spiritual health indicates healthy principles of life.
This does not necessarily mean that the one who read or participates in religious activities is spiritually healthy. The global scenario today is doctors are interested in super specialization. A day will come when we may have right ear specialist or a left ear specialist. Very few physicians perceive the integrity of a person as a whole. However, no one treats mind as an organ in all illnesses.