Wearing a mask can reduce the risk of the spread of the virus, but if you wear an incorrect mask or wear the wrong mask, it is ineffective. So some knowledge you need to know.
Breathing through the mask may take some time to adjust, but do not lower the mask to breathe through the nose.
The valve mask has a one-way valve that allows the exhaled air to pass through a small round or square filter mounted on the front. They only filter the inhaled air, and not filter it out. Therefore, it can protect the wearer from certain pathogens in the air, but it cannot protect the people around you.
Therefore, in situations where a sterile area must be maintained, a respirator with an exhalation valve should not be used, because the exhalation valve allows unfiltered exhaled air to escape into the sterile area.
