Merck & Co., Inc. (Merck) is a global research-driven pharmaceutical company that discovers, develops, manufactures and markets a range of products to improve human and animal health. The Company’s operations are principally managed on a products basis and consist of two business segments. The Pharmaceutical segment includes human health pharmaceutical products marketed either directly or through joint ventures. These products consist of therapeutic and preventive agents, sold by prescription, for the treatment of human disorders. The Vaccines and Infectious Diseases segment includes human health vaccine products marketed either directly or through a joint venture. These products consist of preventative pediatric, adolescent and adult vaccines, primarily administered at physician offices. Infectious disease products consist of therapeutic agents for the treatment of infection sold primarily to drug wholesalers and retailers, hospitals and government agencies.