Coronavirus is about 0.12 microns, Broom said to just cover your face with anything.

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Q. Why is the CDC recommending that people wear cloth masks in public?

A. The reason to do this, even though they're not quite the same efficacy as medical masks, is that they do have some level of efficacy. They are not only a way of decreasing breathing in the virus, primarily through large respiratory droplets, but also a behavioral reminder that there's a pandemic and life is not the same right now ? and a reminder not to put our hands in our eyes nose or mouth until we've washed our hands.

If I had COVID-19, I might not even know it. It's not like I'm sneezing and coughing, and have a fever. It's apparent that you can transmit the virus when you are asymptomatic or presymptomatic. So in that case, we're preventing me from exhaling the virus or respiratory particulate matter out onto the public and into the air where others might get infected. The other side of the coin, if you will, is protecting those who are not infected from becoming infected by breathing in air contaminated with virus or respiratory particulate matter.

Q. What's the difference between cloth masks and medical masks, such as an N95 mask?

A. The idea behind an N95 mask is it has a filtering ability down to, and actually below, the size of SARS-CoV-2, the virus that causes COVID-19. So the coronavirus is about 0.12 microns in diameter and N95 (masks) protect down to 0.1 microns, with 95% efficiency, which is where it gets its name.

We don't want the public to think that the recommendation is for medical masking. That would be detrimental to us as a society, health care providers and patients who are sick with the disease need those masks.

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