A key element of Wisconsin’s plan to help contain the coronavirus pandemic is proving to be difficult. Contact tracers have become overrun. Wisconsin saw an average of 3,400 daily cases reported in the last week. Fond du Lac County Public Health Officer Kim Mueller issued a Health Alert Friday due to very high COVID-19 activity levels. Some Wisconsin counties are no longer able to reach out to an infected person’s contacts, so they’re instead asking infected people to do that work themselves. Dane County is the second-most populous in the state. It’s among those that have switched to what it calls a “crisis model” of contact tracing. Mueller says contact tracing efforts in Fond du Lac County have become increasingly strained. There have been 359 new COVID-19 cases in Fond du Lac County since Friday. There are now 4.425 positive case in the county, and 1.659 active cases.