Pfizer Inc. operates as a global biopharmaceutical company focused on the research, development, and commercialization of healthcare products. The company's diverse portfolio spans several key therapeutic areas, including oncology, internal medicine, inflammation and immunology, rare diseases, and anti-infectives. Notable products include the blood thinner Eliquis, the pneumococcal vaccine Prevnar, the breast cancer treatment Ibrance, and the COVID-19 treatments Comirnaty and Paxlovid. In late 2023, Pfizer significantly expanded its oncology capabilities through the $43 billion acquisition of Seagen, a pioneer in antibody-drug conjugate technology. Additionally, the company operates Pfizer CentreOne, a contract development and manufacturing organization that supplies specialty active pharmaceutical ingredients to other firms.