Four different strains have been identified in Wisconsin, including several in the area. "We're now starting to share more data on these variant strains on our Wisconsin DHS website. Our variant data page now breaks down the number of the different variant strains by region," DHS Chief Medical Officer Dr. Ryan Westergaard said. Since March 11, the positivity rate has almost doubled from two percent to 3.8 percent known active cases. It had been plummeting but started spiking again late March with more than two thousand in about two weeks. Area health experts say the spring weather and traveling could be a factor.