Omicron Variants

The most important lesson of the Covid pandemic is that the only constant is change. Variants spread, cases surge and abate, treatments change and knowledge expands - Tom Frieden

Omicron Variants

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Whither the Omicron Family: BA.1, BA.1.1, BA.2, BA.2.H78Y, BA.3?

The Omicron family of SARS-CoV-2 continues to trouble and puzzle. First is the mysterious origin. The Omicron variants emerged fully formed in Southern Africa in late November 2021, sporting many more mutations than all other variants combined. It appeared not as one but three variants, all related to a cryptic parent itself highly divergent from the strain that swept the world beginning early 2020...

All variants before the appearance of Omicron were neutralized reasonably well by antibodies from those infected or vaccinated. Not so Omicron. Initial studies showed Omicron-BA.1 is resistant to antibodies from those infected with earlier variants as well as to vaccines and many monoclonal…

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Last Updated : Wednesday, April 6, 2022