The deadly outbreak among members of a choir has stunned health officials, who have concluded that the virus was almost certainly transmitted through the air from one or more people without symptoms.
How the Skagit Valley Chorale Learned to Sing Again Amid Covid nytimes.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from nytimes.com Daily Mail and Mail on Sunday newspapers.