Pfizer Inc. engages in the discovery, development, and manufacture of healthcare products specializes in medicines, vaccine, and consumer healthcare. It operates through the Pfizer Innovative Health (IH) and Pfizer Essential Health (EH) segments. The IH segment focuses on the development and commercializing medicines and vaccines for internal medicine, oncology, inflammation and immunology, rate disease, and consumer healthcare. The EH segment is involved in development and supply of branded generics, generic sterile injectable products, biosimilars, and select branded products including anti-infectives. The company was founded by Charles Pfizer Sr. and Charles Erhart in 1849 and is headquartered in New York, NY.