In this photo taken March 29, 2017, Dr. David Maloney of the Fred Hutchinson Cancer Research Center is greeted by patient Ken Shefveland, whose lymphoma was successfully treated with CAR-T cell therapy. Immune therapy is the hottest trend in cancer care and its next frontier is creating "living drugs" that grow inside the body into an army that seeks and destroys tumors. (AP Photo/Elaine Thompson)
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