Merck & Co is one of the world's leading pharmaceutical companies, providing innovative medicines and vaccines to millions of people around the world. This comprehensive overview provides an in-depth look at the company's history, products, research and development, and corporate culture. Learn about
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Merck & Co., Inc. is an American multinational pharmaceutical company headquartered in Rahway, New Jersey. The company does business as Merck Sharp & Dohme or MSD outside the United States and Canada. The company is ranked fifth on the list of largest biomedical companies by revenue.