Gilead Sciences, Inc. is a biopharmaceutical company. It is engaged in advancing medicines to prevent and treat life-threatening diseases, including HIV, viral hepatitis, COVID-19, cancer, and inflammation. It is focused on discovering, developing, and delivering medicines to address unmet medical needs in virology, oncology, and other therapeutic areas. Its portfolio of marketed products includes Biktarvy, Genvoya, Descovy, Complera/Eviplera, Symtuza, Truvada, Stribild, Sunlenca, Epclusa, Vemlidy, Harvoni, Viread, Livdelzi, Veklury, Yescarta, Tecartus, Trodelvy, AmBisome, and Letairis. Its product candidates include Bulevirtide, Lenacapavir, Axicabtagene ciloleucel, Sacituzumab govitecan-hziy, and others. It also develops the HB-400 program and the HB-500 program. It develops therapies that are intended to provide functional cures for hepatitis B virus and human immunodeficiency virus-1. It has a cancer program, namely TREX1. It operates in more than 35 countries worldwide.