Pfizer Inc is a transnational American based pharmaceutical company with its headquarters in New York City, New York, United States. The world's largest pharmaceutical company in terms of revenue was started in 1849, now serving worldwide. The company provides products and medicine that support wellness and prevention, and also treatments to cure disease, it works on new products to cure Cancer and Alzheimer. The company runs special divisions that operate on Primary Care, Specialty Care, Oncology, Emerging Markets, Established Products, Consumer Healthcare, Nutrition, and Animal health. The company develops medicines and vaccines for immunology and inflammation, oncology, metabolic diseases etc with about 103,700 employees.