Thousands of men, women, and children are in need of bone marrow.  Even though there are millions of volunteers on a national registry, there are many patients who can't find the right match.
 
Steve Karas and Matthew Welling aren't related, but they share a special bond.  Welling needed a life-saving bone marrow transplant. 

Karas' name came up on a national registry as a perfect match.  Welling was cured, but the story doesn't end there.  Karas' boss at the AFLAC Corporation got word of his good deed and launched a bone marrow registry drive among his 4,000 employees.
 
Joining the registry involves taking a simple swab of the inside of your cheek to determine your tissue type.