Two positives identified at Daly Elementary April 16, 2021 | 4:21 pm April 16, 2021 Since Montgomery County Public Schools began “preventative” COVID-19 testing of students and teachers, there have been only two positive results, according to school district leaders. On March 25, as part of a partnership with Ginkgo Bioworks, of Boston, Mass., MCPS began rolling out what it calls “pool” COVID-19 tests to identify asymptomatic spread of the virus in its schools. Each week, students and staff members in chosen classrooms swab their noses and put all of the swabs into a single test tube. The tube is then tested for COVID-19, and if a positive result is reported, the people included are asked to complete an individual test.