Among the main tools in the prevention and spread associated with an influenza pandemic is use of protective masks. The Centers for Disease Control and Prevention (CDC) and the Occupational Safety and Health Administration (OSHA) has guidelines for different types of masks. website
Facemasks are loose fitting disposable face masks that cover the nose area and mouth and are commonly used to prevent the spread of disease during surgical, dental and medical procedures. These markers are also used in isolation. These Facemasks help to prevent spread to and by the person wearing thee mask by stopping droplets from being spread by the person wearing them. In addition they keep splashes or sprays from reaching the mouth and nose of the person wearing the facemask. That they are not designed to protect you against inhaling very small particles. Facemasks should be used once and then they should be discarded.
The US department of Labor advises air-purifying respirators as a program for personnel engaged directly with influenza afflicted patients or birds. This kind of is part of your complete respiratory protection program. Since part of the suggestion is air-purifying respirators such as N95, N99 or N100 masks.
These face masks have features of typical towel or surgical masks. They will are greater than 95% effective at filtering. 3 -um particles. A typical droplet made during breathing problems, sneezing and talking is 5 -um, which is significantly larger thus stopping it from passing through the filter. An additional is that these face masks are fit tested to eliminate the likelihood that droplets or particles do not leak around the mask.