Canadian cabinet minister Dominic LeBlanc suffered from Non-Hodgkin's lymphoma, a rare blood cancer that his doctors found difficult to treat. Luckily, after a stem cell transplant, his disease was treated. His donor Jonathan Kehl, a 22-year-old from Germany, recounts his donation: at a school campaign. He "registered, as [did] almost every other student" and prepared his swab accordingly. Little did he know that his sample would go on to save LeBlanc's life.

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