The county has hit nearly 8,000 cases since its first in March 2020. Written By: Rebecca C. Mariscal | 3:30 pm, Mar. 3, 2021 × This illustration, created at the Centers for Disease Control and Prevention (CDC), shows the appearance of the novel coronavirus, which causes COVID-19. Submitted / Centers for Disease Control and Prevention HUDSON -- Nearly a year after the first confirmed COVID-19 case in St. Croix County, the area is coming down from a peak but is still seeing accelerated spread. Since the first case was confirmed on March 19, 2020, the county has seen 7,961 COVID infections as of March 2. The county has had 47 deaths from the disease.