Sure, miracles happen more often than we think or care to admit. Pete Maravich, he was born with only one coronary artery(you're supposed to have two), yet he was able to not only play basketball, but be one of the most profilic scorers in the NBA and the most prolific in NCAA. True, he died at 40, but he should've been gone long before that.
I once a knew a man who was diagnosed with systemic lupus at age 6. Lupus is a terminal disease, so the doctors said he had eight years to live. Yet when he was 14, they did a check and found nothing. The doctors were so stumped on how this happened, they put "Miracle Child" on his file.