The Cedars-Sinai study, which was published in JAMA Network Open, found that the majority of people who were infected with the Omicron variant didn t know they had the virus.
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"People who are infected with Omicron have the full spectrum of disease, everything from asymptomatic infection all the way through severe disease and death," the WHO Official Said.
The INSACOG, in its January 10 bulletin that was released on Sunday, said while most Omicron cases so far have been asymptomatic or mild, hospitalisations and ICU cases have increased in the current wave and the threat level remains unchanged.