- Oct 28, 1999
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There's two sides to the mask science.  Blocking things coming in to you.  Blocking things leaving you.  The simple barrier of a mask helps prevent outward projection of viral carriers from spreading as easily.  If you are in a room full of covid riddled air, a cloth mask will not do much.  The entire concept is doing anything we can to cut down on the outward projection so you don't need as effective barriers on the inbound side.
			
			 
				
		 
			 
 
		 
 
		 
	 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
					
				 
						
					 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		
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