Over 20 years ago I read an article about video games being used to teach about leukemia. I think it was a National Geographic, but I'm not sure.
White cells that went around eating bacteria PAC man style. Platelets that ran into stuff and stuck to things sort of like bubble tanks. Red cells that collected and carried oxygen to other areas. "Chemo" hero who was attacking cancer , antibiotics attacking disease, building new tissue to "heal."
As well as teaching, the theory behind these games was that patients could gain a way to visualize the changes in their body and be able to visualize more effective disease fighting.