If my child had a blood transfusion as a child and the blood might have had sickle cell disease, could he get the disease?

No: Blood cells transferred to your child during a transfusion wear out & are disposed of within 3 months, usually less. There are no cells that could change your childs bone marrow into producing sickle cells. That information passes in the dna at conception, without it in the dna your child won't ever make sickle cells. It is not like an infection.

No: No, sickle cell disease is genetic not infectious and cannot be passed person to person, except parent to newborn child genetically.

No: Sickle cell anemia is not an infection and cannot be transferred from one person to another by a blood transfusion. You need to inherit it from your parents.