About
Merck & Co., Inc. is a global health care leader working to help the world be well. Through our prescription medicines, vaccines, biologic therapies, and consumer care 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 health care through far-reaching policies, programs and partnerships. Merck is known as MSD outside the United States and Canada.