CNN Vital Signs with Dr. Sanjay Gupta August 8, 2015 18:53:00
Repository of these very rare blood groups. with i have a frozen repository here so we can always find the blood. >> one stranger saving another. it's what happened in celia hutchinson's case. in boston, she and her husband walter are back at massachusetts general hospital for a check-up. dr. chen performed celia's stem cell transplant two years ago. >> hi, how are you? walter, sellia great to see but same here. >> take some deep breasts. >> celia has been cancer-free for the past two years. the transplant did its job, celia credits her donor, stuart, with saving her life. >> i hear from my do...