About 1/3 of the Gospels have to do with healing. In fact, Jesus was so involved in healing and growth He was and is known alternatively as the "Great Physician" and "Great Teacher".
Think for a moment about the causes and cures of disease, illness, and wounds. God told Moses that the children of Israel left a filthy, despicable, sick people, but they can be protected from getting the "Lifestyle Diseases" Egyptians got and gave to one another. All they had to do was follow His guidance.
Here is the story that preceded God's promise to Moses. (Exodus 15:)
From the beginning of God's people they were destined to be carriers of health and hope.