At least 15 US states have confirmed the presence of COVID-19 variant, Omicron, said US Centers for Disease Control and Prevention (CDC). Rochelle Walensky, CDC Director said, "We know we have several dozen cases and we're following them closely. 

And we are every day hearing about more and more probable cases so that number is likely to rise," reported Sputnik citing ABC's "This Week" on Sunday. However, Walensky revealed that the COVID-19 variant delta still covers most of the reported COVID-19 cases in the US.