Multiple Oklahoma school districts are closing their doors and moving to virtual for parts of this week due to the spread of flu in their schools. Schools like Lindsay Public Schools and Piedmont Public Schools are among the districts taking action while the entire state of Oklahoma is above the baseline for percent of flu tests coming back positive. Flu has been on the rise in Oklahoma since late November, reaching a peak in the week ending Jan. 18, the latest data available. That week, 25% of flu tests in the state came back positive, and there were three…..