Maine sleep-away camps prevented coronavirus spread among more than 1,000 people, CDC report finds They tested before and after, assigned people to cohorts, limited movement beyond the camp, and used PPE and social distancing. https://www.washingtonpost.com/health/2020/08/26/maine-sleep-away-camps-prevented-coronavirus-spread-among-more-than-1000-people-cdc-report-finds/