Most people with Omicron unaware of infection

Even modest levels of undiagnosed cases can lead to rapid transmission: US authors

One in two adults with lab-confirmed Omicron infection remain completely unaware of their COVID-19 status, US findings show. 

In a cohort study of 210 people with evidence of seroconversion during an Omicron variant surge, 56% did not realise they had been infected, say researchers from Cedars-Sinai Medical Center in Los Angeles.