Remdesivir is a nucleoside analogue with antiviral activity. It inhibits Middle East respiratory syndromecoronavirus (MERS-CoV) or severe acute respiratory syndrome coronavirus (SARS-CoV) infectedHAE cultures with EC₅₀ values of 74 nM and 69 nM. It inhibits murine hepatitis virus (MHV) with anEC₅₀ of 30 nM in delayed brain tumor (DBT) cells.