The Food and Drug Administration (FDA) on Friday expanded its emergency use authorization (EUA) of Eli Lilly and Co’s dual-antibody therapy for mild to moderate COVID-19 to all children, including newborns. The treatment consists of bamlanivimab and etesevimab—two monoclonal antibodies that are administered by intravenous infusion. The two monoclonal antibodies are directed against the spike protein of SARS-CoV-2, to block the virus’s attachment and entry into human cells. They work by binding to different but overlapping sites on the spike protein. The antibody treatment was first authorized for emergency use in February for people aged 12 years and older who weigh at least 88 pounds (40 kilograms), who have mild to moderate COVID-19 symptoms and are at high risk for progression to severe COVID-19, including hospitalization or death. The FDA in September authorized use of the antibody therapy for post-exposure prevention of COVID-19 in the same population. The latest FDA authorization extends the treatment to all children, …