IROC, I don't set what my God can do, that is set by God. By definition God COULD do whatever he/she wants to. Ruling the globe like a puppeteer isn't how it works though.
By the way, there have been studies into prayer for healing in the hospital, a small clip from an article is below:
"San Francisco cardiologist Randolph Byrd, for example, conducted an experiment in which he asked born-again Christians to pray for 192 people hospitalized for heart problems, comparing them with 201 not targeted for prayer. No one knew which group they were in. He reported in 1988 that those who were prayed for needed fewer drugs and less help breathing.
William S. Harris of St. Luke's Hospital in Kansas City, Mo., and colleagues published similar results in 1999 from a study involving nearly 1,000 heart patients, about half of whom were prayed for without their knowledge."
http://www.washingtonpost.com/wp-dyn/content/article/2006/03/23/AR2006032302177_2.html
Of course there are a lot of scientists who feel that these studies are biased and should not be done. Just FYI.