Oscar Saxelby-Lee was just 5 years old when leukemia gave him a deadline.

His school in Worcester, England, did not stand idly by. It organized a donor registration drive, and something happened that no one expected. Nearly 5,000 people (4,855, to be exact) stood in line in the rain, willing to share their bone marrow with a child they did not even know. The organization DKMS confirmed it: they had never seen so many people gathered for a single cause in a single day.

They found a compatible donor, and Oscar received his transplant in May 2019. For a while, everything indicated that he had won the battle. But the leukemia returned months later, and this time the answer was more than 10,000 kilometers away, in a hospital in Singapore. Relatives, neighbors, and strangers came together again and raised nearly 500,000 pounds to pay for an experimental CAR-T cell treatment. In January 2020, doctors could no longer find any traces of cancer in his body. Oscar returned home that same year, living proof of what a community determined not to give up can achieve.

