[coffeebean]

Originally Posted by GoodLife

LOL The two respiratory specialist Doctors who wrote that commentary looked at all the available studies that tested masks against virus particles. Coronavirus is no different than any virus that transmit thru cough and sneeze droplets or fine particle aerosols. There is no new magic cloth mask technology that can block fine aerosol particles, only N95 can do that.

Filter efficiency was measured across a wide range of small particle sizes (0.02 to 1 µm) at 33 and 99 L/min. N95 respirators had efficiencies greater than 95% (as expected). For the entire range of particles tested, t-shirts had 10% efficiency, scarves 10% to 20%, cloth masks 10% to 30%, sweatshirts 20% to 40%, and towels 40%. All of the cloth masks and materials had near zero efficiency at 0.3 µm, a particle size that easily penetrates into the lungs.

Near zero efficiency

If you think that cloth mask is protecting you from virus aerosols, go for it.

This article explains how cloth masks not only block droplets but block aerosols too.....

Cloth masks can block aerosol-sized particles, prevent Covid-19 spread - The Week