Right but the metabolites produced by the bacteria are harmful in their own right. And let's be clear, there are many airborne contagions like the common cold t

Right but the metabolites produced by the bacteria are harmful in their own right. And let's be clear, there are many airborne contagions like the common cold that haven't been indexed through the centuries. It isn't a good idea to inhale shit air for days on end, just like it isn't a good idea to inhale car fumes for days on end. https://en.wikipedia.org/wiki/Volatile_organic_compound https://en.wikipedia.org/wiki/Volatile_organic_compound