Merck & Co., Inc. is a global healthcare company based in Kenilworth, New Jersey. Founded in 1891, it focuses on developing prescription medicines, vaccines, and biologic therapies. The company is known for its research in various therapeutic areas, including oncology, infectious diseases, and vaccines. Merck operates in more than 140 countries and is recognized for its commitment to improving health outcomes worldwide. It is also involved in various initiatives to enhance access to healthcare and support public health efforts, including partnerships with organizations like the World Health Organization and Gavi, the Vaccine Alliance.