For Merck & Co. Inc., succeeding in immuno-oncology centers on the PD-1 inhibitor Keytruda (pembrolizumab). The company is moving aggressively to expand Keytruda into as many indications as possible, and during a briefing at the American Society of Clinical Oncology (ASCO) meeting in June, management claimed the drug is being tested in the broadest clinical development program for an anti-PD-1/L1 in the industry.
Keytruda is being tested in more than 270 trials in 30 types of tumors, including in100 combination studies, the company...






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