Omicron: Merck says its Covid-19 anti-viral pill will have similar efficacy against Omicron

US pharmaceutical giant Merck said on Tuesday that it expected its antiviral pill to show similar activity against any new Covid-19 variant, including Omicron, according to Reuters. The company's remarks come after the Regeneron CEO said live on CNBC earlier in the session that he thought Merck's pill would no longer work.