 Hetero has supplied antiretroviral drugs to patients across more than 100 countries globally.Today, Oseltamivir, sold under its brand name Tamiflu, is also indicated for A[H1N1] virus, also known as swine flu.Hetero also produces hepatitis C antivirals such as Sofovir (sofosbuvir) and Ledifos (a fixed-dose combination of sofosbuvir and ledipasvir).