News County records fifth known COVID-19 case May 27, 2020May 27, 2020 Staff The Lassen Cares website reports a fifth known case of COVID-19 in Lassen County as of 1:03 p.m. Wednesday, May 27. According to the website, there are five known COVID-19 cases. The county has administered 814 tests with 587 negative results and 222 results pending. The county also reports 70 serology tests to search for antibodies. So far, there is one positive result and 69 negative results.