First case of Omicron variant found in state

The newest COVID-19 variant of concern, the Omicron variant, was discovered in Wisconsin, Dec. 4. The Omicron variant, B.1.1.529, was classified as a variant of concern by the Centers for Disease Control and Prevention (CDC) Nov. 30.

Variants are classified as variants of concern if they show evidence of being more contagious, causing more severe illness, or resistance to diagnostics, treatments or vaccines.

To date, one case of the Omicron variant has been identifi ed in a specimen from a Wisconsin resident, with recent travel history to South Africa. The person was fully vaccinated and had received a booster dose, with the person reporting mild symptoms and no hospitalization has been required.

The Omicron variant was first discovered in South Africa, in November 2021, and spread to the United States, including Wisconsin. The Omicron variant contains a concerning number of mutations to the spike protein. Certain mutations on the spike protein were already recognized on other variants, and have been associated with increased transmissibility and antibody resistance.

It will take several weeks to determine the Omicron’s transmissibility, impact on disease severity, and the effectiveness of vaccines and treatments against it.

“With the detection of Omicron in Wisconsin, Wisconsinites should stay vigilant in their efforts to stay healthy, and to help prevent further strain on our heavily burdened hospital system,” said Department of Health Services secretary-designee Karen Timberlake. “As we learn more about this variant and how easily it spreads, it’s crucial that all Wisconsinites continue to practice good public health safety measures like getting vaccinated, wearing a mask, staying home if you’re sick and getting tested.”