Why wouldn’t it have spread at as well in the trenches where you have repeated exposure to the same group of people? Open air/​sunlight, perhaps? Or are you emphasizing the travel aspect (coming into contact with more people total than the mild cases)?
Why wouldn’t it have spread at as well in the trenches where you have repeated exposure to the same group of people? Open air/​sunlight, perhaps? Or are you emphasizing the travel aspect (coming into contact with more people total than the mild cases)?