When is someone contagious with the Omicron variant?
Based on previous data, that means people with omicron could start becoming contagious as soon as a day after infection. With previous variants, people became contagious two to four days after infection. And people remain contagious a couple days after symptoms subside.
All of the variants, including Delta and Omicron, cause similar CO VID-19 symptoms, including cough, fever and fatigue. There is some evidence that fewer people with Omicron lose their taste and smell. Omicron is also less likely to cause severe disease such as pneumonia that may require treatment in the hospital.
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