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In November, a new coronavirus variant took the world by storm. Omicron has since caused an unprecedented wave of infections, striking about 90 million people in just 10 weeks. That’s more COVID-19 ...
Since Omicron was detected in South Africa in late November, the SARS-CoV-2 variant has spread to more than 165 countries and is now the dominant strain. Omicron has more mutations than other strains: ...
Serum samples obtained from unvaccinated persons after infection with the B.1.1.7 (alpha), B.1.351 (beta), or B.1.617.2 (delta) variant of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ...