On December 1, 2021, the United States detected its first case of the Omicron variant.Variant B.1.1.529, also known as the Omicron variant, was first discovered in South Africa in November 2021.Learn more about SARS-CoV-2 variant classifications on the CDC website. The classification of a particular variant might change based on new research.
Whether COVID-19 treatments and vaccines can prevent it.The CDC classifies variants into four categories:Ī variant's classification is based on its attributes, including: Understand how common the new strains are in our communities, not to have a real-time number of cases infected with each strain.The Centers for Disease Control and Prevention (CDC) classifies these as variants of concern. Help public health effectively plan COVID-19 prevention measures because some variants can spread more quickly than earlier strains and/or reduce the effectiveness of vaccines or treatments.Know which variants make up the largest proportion of new cases in Wisconsin.Understand which strains are spreading in our state.See variant data from the Wisconsin State Laboratory of Hygiene. DHS has also requested that clinicians identify cases that may be good candidates for genome sequencing, such as individuals who have traveled internationally or individuals who may have tested positive after being up to date with COVID-19 vaccines. The Department of Health Services (DHS), the Wisconsin State Laboratory of Hygiene, and other laboratory partners regularly perform whole genome sequencing on a portion of positive tests.
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