Hmm.. so does this imply T-cell replacement therapy or 3D-printed cloned thymus transplatation may both decrease cancer growth and prevent new cancers from developing past a few cells? And, IIRC, isn’t cancer one of the top, if not the top, life-expectancy limiting factors?
I'm not well versed enough in immunology to answer the first question, but if we interpret life limiting factors as causes of death, cancer actually doesn't even break the top 10 causes of death in the world.