In hepatitis C, people born with the IL28B CC genotype can count themselves luckier than those born with CT or TT.
To read the full article, go to the Cleveland Clinic Journal of Medicine: http://www.ccjm.org/home/article/genetics-and-hepatitis-c-its-good-to-be-cc/0afbe8ada94cdbab08fd0663c76e460e.html.