Sin and Health

I believe that sin in a way can cause decreased health. This does not mean that all decreased health is caused by sin, but it does mean that repentance and prayer ca have positive effects on health.

I've performed outstanding holy works through prayer, and seen the lights grow brighter and several cars passing on the road simultaneously change their engine noise levels. I think the things that I do and pray for affect the efficiency and goodness of the universe. What is the science behind this? Assume God, assume miracles.

-prayer has caused bacteria in a petri dish to grow faster than control groups
-prayer has healed stricken individuals that medical science deemed terminally ill
-immune system and health are not yet understood