That's exactly what helps 3-year-old Ty McCullar stay alive.
Ty, diagnosed with two rare conditions from birth in addition to cancer, has been fighting an uphill battle for every breath since birth.
"Without blood and platelet donors,Ty would not be here today. I can say that 100 percent," his mom, Lauren, said. "During chemo, there were weeks where he would need two blood donations a week, or extra platelets. Without those, he wouldn't have lived."
To see the full interview with Ty's mother, watch the embedded video.