Pfizer Inc. is a global pharmaceutical and biotechnology corporation headquartered in the United States. Pfizer was established in 1849. Pfizer was founded by two cousins, Charles Pfizer and Charles Erhart. It is one of the largest pharmaceutical companies in the world, known for developing and manufacturing a wide range of medicines and vaccines across various therapeutic areas. Pfizer’s portfolio includes products for cardiovascular diseases, oncology, immunology, neurology, and many others. The company has a significant presence in research and development, aiming to address unmet medical needs and improve patient outcomes worldwide.