The majority of people likely infected with the omicron variant that causes COVID-19 were not aware they contracted the virus, which likely played a role in the rapid spread of omicron, according to a study published this week.
Researchers at Cedars-Sinai, a nonprofit health organization based in Los Angeles, examined the infectious status of individuals during the omicron surge in the U.S.
Omicron was first detected in November 2021 and has become one of the most dominant variants of COVID-19. Common symptoms are typically less severe than other variants and include cough, headache, fatigue, sore throat and a runny nose, according to the researchers.
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