Thank science! (And also those people who participated in a campaign to help him get a match.)
My mom was diagnosed with a rare variant of AML (APML or APL) in April 2011. When she was admitted to the hospital, she had at maximum one or two days left to live before she would have hemorrhaged to death without medical attention (no platelets).
When APML was first discovered in 1957, the average patient lived 2 weeks and the death rate was 100%. "God" didn't save a single person with APML prior to 1957.
Now the "cure" rate of APML is 95%. It's pretty astounding. My mom has now lived 10 months longer than she would have without modern medical science and hopefully will live a good deal longer because of it.
My mom is incredibly thankful, not to God (who she believes in), but to modern medicine. She even decided to not invite my Christian Scientist cousins to my wedding (which she was able to attend 4 months after her diagnosis) because she strongly feels that people who disregard medical science in favor of God are literally wishing her dead.