Olmsted County marks one year of COVID-19 response efforts Tomorrow marks one year since Olmsted County created its first Emergency Operations Center to begin tackling the pandemic. Posted: Feb 25, 2021 5:25 PM Updated: Feb 25, 2021 10:49 PM Posted By: Mary Peters ROCHESTER, Minn. - Tomorrow marks one year since Olmsted County created its first Emergency Operations Center to begin tackling the pandemic. On March 11th, 2020, the first positive case of COVID-19 was found in Olmsted County. Since then, Mayo Clinic, Olmsted County, and Olmsted Medical Center have partnered together to try to fight this pandemic. On March 23rd, 2020, Mayo Clinic partnered with Olmsted County and Olmsted Medical Center to set up the first testing site in the state at Graham Park.