The four most common symptoms of the omicron variant are cough, fatigue, congestion and runny nose, according to a CDC analysis of the first 43 cases investigated in the US. In some cases, vomiting has also been reported as a symptom among those with the variant, the report said.
Based on preliminary evidence Dr. Radner said omicron is a multi-mutational change, which means it has a number of changes that make it look different from other strains.