#ASCO19: Merck’s PD-1 star Keytruda illustrates just how powerful it can be over 5 years — with plenty of room for improvement
CHICAGO — Merck took center stage at a muted ASCO Saturday morning opening with its impressive 5-year update on what Keytruda has done for lung cancer patients. The PD-1 more than quadrupled the survival rate of patients with non-small cell lung cancer who had not been previously treated with chemo — jumping from earlier grim expectations of a 5.5% 5-year survival rate to 23.2%.
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