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Researchers from Edinburgh University tested how much diesel exhaust different masks could block, including a surgical mask. They tested down to .007 microns. That's way smaller than 2.5 microns, and it's 10 times smaller than the coronavirus. The surgical mask blocked 80% of particles.

From smartairfilters.com...
One important detail: the particle unit utilized measured particles as small as 0.007 microns. That's over 10 times smaller than the coronavirus particle diameter. We're talking about truly tiny particles here!

They tested a whole range of masks, and here's what they found:



3M industrial filters were able to capture over 95% of particles down to 0.007 micron. Given that news outlets have claimed surgical masks cannot capture nanoparticles, YET, it's particularly surprising that the surgical mask was able to capture 80% of the tiny particles.

From smartairfilters.com...

Medical / Surgical Masks

Initally, the CDC and The World Heath Organization advised the general public against wearing face masks. This recommendation was based on the overwhelming shortage of face masks for those who desperately need them.

On April 3, 2020, the CDC changed their tune. The CDC released a statement recommending everyone visiting public or crowded locations, such as grocery stores or pharmacies, should wear a cloth mask covering their mouth and nose.

White House Officials have further promoted this action, stating simply keeping 6 feet between yourself and others is NOT enough to stop the spread. This recommendation follows the list of cities and countries that have already implemented recommendations and mandates for citizens to wear face masks.

According to the CDC, new research on the coronavirus shows that many of those infected do NOT show symptoms, but can still transmit the virus. Therefore, the CDC is now advising all Americans to wear masks to help slow the spread of the virus..