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"What is a face mask
Face masks are one tool utilized for preventing the spread of disease. They may also be called dental, isolation, laser, medical, procedure, or surgical masks. Face masks are loose-fitting masks that cover the nose and mouth, and have ear loops or ties or bands at the back of the head. There are many different brands and they come in different colors. It is important to use a face mask approved by the FDA.

What is a face mask used for
Facemasks help limit the spread of germs. When someone talks, coughs, or sneezes they may release tiny drops into the air that can infect others. If someone is ill a face masks can reduce the number of germs that the wearer releases and can protect other people from becoming sick. A face mask also protects the wearer’s nose and mouth from splashes or sprays of body fluids.

When should a face mask be worn
Consider wearing a face mask when you are sick with a cough or sneezing illness (with or without fever) and you expect to be around other people. The face mask will help protect them from catching your illness. Healthcare settings have specific rules for when people should wear face masks."

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"Can wearing a medical face mask protect you against the new coronavirus? It's a question many people are asking, including pet owners who are putting canine face masks on their dogs.

If it's a regular surgical face mask, the answer is no, Dr. William Schaffner, an infectious disease specialist at Vanderbilt University in Tennessee, told Live Science.

A more specialized mask, known as an N95 respirator, can protect against the new coronavirus, also called SARS-CoV-2. The respirator is thicker than a surgical mask, but neither Schaffner nor the Centers for Disease Prevention and Control (CDC) recommend it for public use, at least not at this point.

That's because, in part, it's challenging to put on these masks and wear them for long periods of time, he said.

Specialists receive retraining annually on how to properly fit these respirators around the nose, cheeks and chin, ensuring that wearers don't breathe around the edges of the respirator. "When you do that, it turns out that the work of breathing, since you're going through a very thick material, is harder. You have to work to breathe in and out. It's a bit claustrophobic. It can get moist and hot in there," Schaffner said.

"I know that I can wear them when I need to for about a half-hour," he added. "But then, I have to go out of the isolation room, take it off and take some deep breaths, kind of cool off, before I can go back in."

While it still might be possible to snag an N95 respirator online, Schaffner advised against it. If too many people unnecessarily stockpile respirators, a shortage could put the health of medical workers and those who need them at risk, Schaffner said."