Why Omicron variant is less severe among vaccinated

Omicron emerged as a variant of concern only in November 2021, but all the mutations it contains, except one, had been described before that. Researchers at the Federal University of Sao Paulo (UNIFESP) in Brazil attribute this factor to the effectiveness of the existing vaccines against the variant, reflected in the relatively small number of severe cases and deaths despite Omicron's heightened transmissibility.
Read more...

;