Refrain from eating, drinking, chewing gum or using tobacco for 30 minutes prior to testing. Written By: News Tribune | × COVID-19 saliva test kits sit in a box at the Duluth Entertainment Convention Center public testing site. (Tyler Schank / 2020 file / News Tribune) St. Louis County Public Health will be hosting free COVID-19 testing events in various Duluth neighborhoods this month. According to a news release, the locations were chosen to ensure easy access for people who may have transportation challenges that prevent them from being tested at other sites around the city of Duluth. Testing dates and locations: Feb. 5, noon-p.m., LifeHouse Imaginarium, 16 N. First Ave. W.