Amid the Omicron variant pushing coronavirus infections to record-high levels in the United States, thousands of schools – including in some major cities – have delayed scheduled return to classrooms following the holiday break or switched to remote learning.The sheer number of cases has alarmed health officials with hospital systems in many states already strained. Maryland, Ohio, Delaware and Washington, DC, are all at or near record COVID-19 hospitalisation rates.Dr Anthony Fauci, the nation’s top infectious diseases expert, said the US has been seeing almost a “vertical increase” of new cases, now averaging 400,000 cases a day, with hospitalisations also up.
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