Merck & Co., Inc., is a health care company. The Company delivers health solutions through its prescription medicines, vaccines, biologic therapies, animal health, and consumer care products, which it markets directly and through its joint ventures. The Company�s operations are principally managed on a products basis and are comprised of four operating segments, which are the Pharmaceutical, Animal Health, Consumer Care and Alliances segments. The Pharmaceutical segment includes human health pharmaceutical and vaccine products consisting of therapeutic and preventive agents, sold by prescription, for treatment of human disorders. The Company has animal health operations that discover, develop, manufacture and market animal health products. The Consumer Care develops, manufactures and markets over-the-counter, foot care and sun care products.