Merck & Co., Inc., a global healthcare company, has been operating through two major segments, Pharmaceutical and Animal Health. The Pharmaceutical segment provides a wide range of human health pharmaceutical products such as oncology, hospital acute care, immunology, neuroscience, virology, cardiovascular, and diabetes. Additionally, it offers vaccine products for preventive pediatric, adolescent, and adult vaccines. On the other hand, the Animal Health segment develops, manufactures, and markets veterinary pharmaceuticals, vaccines, and health management solutions and services. Apart from that, it also provides digitally connected identification, traceability, and monitoring products. Merck & Co., Inc. caters to various healthcare providers such as drug wholesalers and retailers, hospitals, government agencies, managed healthcare providers, and physicians. The company has established collaborations with AstraZeneca PLC, Bayer AG, Eisai Co., Ltd., Ridgeback Biotherapeutics LP, and Gilead Sciences, Inc. to jointly develop and commercialize long-acting treatments in HIV. Established in 1891, Merck & Co., Inc. is headquartered in Rahway, New Jersey.