This video discusses how masks work to prevent the spread of Covid-19. Various ideas and concepts are discussed concerning how a mask works and how the mask stops the agent of transmission carrying the virus. The idea of concentration or flux of the virus load and its impact on the infection of people is mentioned. Does a mask work to stop the number of people infected with Covid-19? Do mask deniers have a factual case or is their opinion based on errors, ommisions, and lack of information?<br />...<br /><a href="https://www.youtube.com/watch?v=CIK1Egtj22s" target="_blank" rel="nofollow">https://www.youtube.com/watch?v=CIK1Egtj22s</a>