Gilead Sciences is a biopharmaceutical company, focusing on medicines to prevent and treat diseases, including HIV, viral hepatitis and cancer. Co.'s products include: Biktarvy®, which is an oral formulation dosed once a day for the treatment of HIV-1 infection in certain patients; Veklury® (remdesivir), an injection for intravenous use, which is a nucleotide analog RNA polymerase inhibitor indicated for certain patients for the treatment of COVID-19 requiring hospitalization; and Epclusa®, which is an oral formulation of a once-daily single tablet regimen of sofosbuvir and velpatasvir for the treatment of chronic hepatitis C virus (HCV) infection in adults and certain pediatric patients.