Regeneron says Covid-19 drug could be less effective against Omicron variant

The Regeneron Pharmaceuticals company logo is seen on a building at the company's Westchester campus in Tarrytown, New York, U.S. September 17, 2020. Picture taken September 17, 2020. REUTERS/Brendan McDermid
Regeneron Pharmaceuticals Inc said on Tuesday prior analyses suggested its Covid-19 antibody drug could have reduced activity against the Omicron coronavirus variant.