The Omicron Covid-19 variant has been reported in 89 countries and the number of cases is doubling in 1.5 to three days in areas with community transmission, the World Health Organization has said.
Two years into the pandemic, the United States is confronting another dark winter, with the Omicron variant threatening to worsen an already dangerous surge of cases.
The cumulative number of confirmed Covid-19 cases in the United States exceeded 50.8 million as of yesterday, with the death toll surpassing 806,400, according to data released by the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University.