Merck (NYSE: MRK), known as MSD outside of the United States and Canada, today announced the U.S. Food and Drug Administration (FDA) approved KEYTRUDA ® (pembrolizumab) and KEYTRUDA QLEXTM (pembrolizumab and berahyaluronidase alfa-pmph), each in combination with Trodelvy ® (sacituzumab govitecan-hziy), Gilead’s Trop-2-directed antibody-drug conjugate (ADC), for the first-line treatment of adult patients with unresectable locally advanced or metastatic triple-negative breast cancer (TNBC) whose