The trial testing of schoolchildren for Covid-19 started at a primary school in Sedlcany on Monday, with the first and second graders, the only pupils who can go to school now, from four classes participating, school principal Jaroslav Nadvornik has told CTK. The parents of roughly 85 percent of the pupils gave consent to the testing, he added. Local dentist Laura Roden secured non-invasive antigen tests from saliva. This was her own initiative, Nadvornik said.