Earlier in the month, Seth Lane, a 5-year-old boy who was born without an immune system made a video asking people to wear his favorite color, yellow, on March 27, as he faces yet another operation.
Today is that day.
Seth, who is from Northamptonshire in England, suffers from Severe Combined Immonudeficiency (SCID) — also known as "bubble boy" disease — which requires patients to live in sterile environments. This has caused Seth to spend most of his young life in hospital.
He's already undergone one bone marrow transplant, and now he has to face another in a few weeks. His father will be his donor.
"Even the common cold could lead to death because his body cannot deal with it, but if the transplant is successful, then he can be cured," Seth's mother, Leanne, told ABC News.
As he prepares for the transplant — and several more months confined to his hospital room — his parents helped him record this video message: