Article content The Renfrew County and District Health Unit (RCDHU) in collaboration with the Renfrew County District School Board (RCDSB), is confirming that one staff member linked to three schools – Opeongo High School, Madawaska Valley District High School and Sherwood Public School – has a positive laboratory-confirmed case of novel coronavirus 2019 (COVID-19). All students and staff who have been deemed to be a close contact of the positive case, have been given direction to go home immediately to self-isolate and arrange for testing. The schools remain open to in-person learning for all other students and staff, according to a RCDHU release issued Thursday afternoon.