SALEM, Ore. (AP) — The Oregon Health Authority reported 457 new COVID-19 cases on Friday, the highest daily total since the start of the pandemic. Officials attributed the rise in cases to Labor Day celebrations, the return of college students to campus and the interruption of testing during recent wildfires in Oregon. Last week health experts said the rate of transmission of COVID-19 in Oregon was in a “downward trend.” But on Friday, experts said that cases are once again increasing. More than 32,300 people have tested positive for COVID-19 in Oregon since the start of the pandemic. The death toll is 542.