There are 2 sides to this issue, the spirit side and the secular side.
I fully believe that God covers both aspects in the Old and New Testaments.
Like with the dietary laws. I fully believe they have a spiritual side and a secular side. http://www.jesus-christ-forums.com/home/viewtopic.php?t=4485
By secular I mean something to benefict us normal humans.
Medical Science today is good, a LOT better then it use to be. To fully understand the past history and fully explain it will take some research.