COVID-19 VOCs – Especially Delta Variant – More Virulent Than Original Strain

A large study from Ontario confirms that SARS-CoV-2 variants of concern (VOCs), especially the Delta variant, are more virulent than the native strain of the virus, increasing people’s risk of hospitalization, admission to the intensive care unit (ICU) and death due to COVID-19. The research is published in the CMAJ (Canadian Medical Association Journal).
The study included 212 326 cases of COVID-19 reported between February 7 and June 26, 2021, in Ontario, Canada’s largest province with a population of almost 14.8 million. Variants of concern include those with the N501Y mutation such as Alpha, Beta and Gamma as well as Delta, which have …