Why people working snowy slopes may be at greater risk of catching COVID than skiers

Fresh air and speed make skiing and snowboarding low-risk activities for COVID-19 transmission, but Canadian infectious disease doctors say spread can still happen, and outbreaks reported at larger resorts have affected mostly staff members. https://www.cbc.ca/news/health/ski-covid-19-1.5916713?cmp=rss #news/health