North Central Public Health District says thirty cases of COVID-19 were reported Sunday among residents and staff at Flagstone Senior Living in The Dalles.  District Health Officer Dr. Mimi McDonell said in a statement that most of the cases are mild or asymptomatic, and no one has had to be hospitalized.  Tests were given to 119 residents and staff late last week and results came back Sunday from the Oregon State Public Health Laboratory.  The district says all positive cases, and identified family members and close contacts have been notified.  McDonell indicated Flagstone administration responded immediately to the initial positive case, rapidly completed testing of all residents and staff, and has increased cleaning schedules, enhanced usage of personal protective equipment, and initiated other measures to reduce the risk of further transmission.  Under Oregoj Health Authority guidelines, everyone at Flagstone who has tested negative will be re-tested on a weekly basis until the facility has gone without a positive case for two consecutive weeks.  McDonell said outbreaks at long term care facilities do not affect school metrics that determine when schools can return to in-person learning.