i saw a show on the nature channel, where the tazmanian devil a dying very fast from a transmittable cancer (the only one of its kind).
seems like 3/4 of the tazmanian devils affected were from the same inbred parents.
since the cancer was a mutated form of their own genes, their body's immune system was not fighting it. scientist had to use devils from the other side of the island to start vaccines (this cancer became like a virus).
if adam and eve were inbreeding and god made them with an immune system............... then guess what could of happened to their inbred children?