ZURICH—Swiss drugs regulator Swissmedic said on Monday it approved Ronapreve, an antibody treatment jointly developed by Roche and Regeneron, to treat COVID-19 patients. “In this procedure, no data on efficacy against the Omicron variant were submitted,” Swissmedic said in a statement. The antibody treatment was already authorized for prescription in Switzerland under COVID-19 Ordinance 3…