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The lack of public awareness about being infected means that people can't take steps to prevent themselves transmitting the virus further, which is a major stumbling block for addressing new waves of the pandemic.
"More than one in every two people who were infected with Omicron didn't know they had it," said Dr. Susan Cheng, a corresponding author of the study which is published in JAMA Network Open.
Previous studies have estimated that at least 25% and potentially as many as 80% of people infected with the coronavirus may not experience symptoms, the researchers say.
Comment: What does that say about this, from CNN?: