Heart touching moment for 6-year-old John Oliver

Six year old John Oliver has just got finished his very last chemo treatment and by beating leukemia.

Leukemia is a cancer of the blood or bone marrow. Bone marrow produces blood cells. Leukemia can develop due to a problem with blood cell production. It usually affects the leukocytes, or white blood cells.
So, his entire school celebrated this happy moment by giving him a standing ovation!