Oregon Department of Education Director Colt Gill: “Keeping schools open is the best option for our state and, most importantly, for our students. Our safety efforts should focus on practicing good hygiene, staying home when we are not feeling well, and cleaning surfaces in our schools. We can all play a part with these simple steps to protect ourselves and our friends, classmates and community.”
It sounds like the justification is that there are no existing cases. We also have a very low testing capacity in Oregon right now, so.
oregon.gov