Regeneron says its COVID-19 therapy has lower potency against Omicron

AstraZeneca and Regeneron on Thursday reported contrasting data on the effectiveness of their COVID-19 antibody therapies against the Omicron variant of the coronavirus, underscoring the major challenges ahead for drugmakers. U.S.-based Regeneron said its REGEN-COV therapy, also called Ronapreve, is less effective against Omicron, though it is still active against the Delta variant, confirming indications from lab tests and computer modelling late last month