A cell infected with the omicron variant of SARS-CoV-2, viewed under an electron microscope and subsequently stained.AP Ever since the Covid pandemic began and new variants of the original virus emerged, each new one became the most contagious.Alpha was much more transmissible than the original, but less so than Beta, which in turn had less transmission power than Delta, which was very contagious but not as much as Omicron.
#people #information #united-states #increasingly #world-health-organization #surveillance #covid-pandemic #hospitalizations #immune-system #early-december
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