Today's MSD is a global healthcare leader working to help the world be well. Through our prescription medicines, vaccines, biologic therapies, and animal health products, we work with customers and operate in more than 140 countries to deliver innovative health solutions. We also demonstrate our commitment to increasing access to healthcare through far-reaching policies, programs and partnerships. MSD. Be well. Merck & Co., Inc. Kenilworth, NJ USA, is known as MSD outside the United States and Canada.