Merck & Co. (NYSE:MRK) has revealed that Frank Clyburn, executive vice president and president, Human Health, will depart the company on Feb. 1, 2022. At Merck, Clyburn had P&L responsibility for almost 90% of Merck’s business. Clyburn will assume the CEO role at International Flavors & Fragrances (IFF/NYSE:IFF) on Feb. 14. “I’m excited to join…