Gilead Sciences, Inc. is a research-based biopharmaceutical company. The Company focuses on the discovery, development and commercialization of medicines in areas of unmet medical need. The Company's principal areas of focus include human immunodeficiency virus (HIV), liver diseases, such as chronic hepatitis C virus (HCV) infection and chronic hepatitis B virus (HBV) infection, cardiovascular, hematology/oncology and inflammation/respiratory. The Company's HIV products include Genvoya, Stribild, Complera/Eviplera, Atripla, Truvada, Viread, Emtriva, Tybost and Vitekta. The Company's liver diseases products include Harvoni, Sovaldi, Viread and Hepsera. The Company's cardiovascular products include Letairis, Ranexa and Lexiscan/Rapiscan. The Company oncology product is Zydelig. The Company's respiratory products include Cayston and Tamiflu. The Company's other products include AmBisome and Macugen.