Do you remember the contagious SARS virus, which is widespread around the world in 2003? At that time, the medical experts recommended every one to wear the N95 masks so as to prevent infection. Therefore, N95 masks were widely used in China, Hong Kong, Vietnam, and Toronto, Canada during outbreaks of the SARS virus. After that, when there are infectious diseases such as the 2007 avian bird flu pandemic in Japan or the 2009 H1N1 flu outbreak in the United States and Mexico City, people have begun to aware of the importance of wearing the respirators.

NIOSH certified N95 masks/ respirators are designed to help provide respiratory protection for the wearer. The N95 respirator/mask has a filter efficiency level of 95% or greater against particulate aerosols free of oil when tested against a 0.3 micron particle. It is fluid resistant, disposable and may be worn in surgery.

Wearing Guidance:

1. How to wear?

Masks should be fit tested according to the manufacturer's recommendations. In addition, masks should be fit checked each time the mask is put on. To check test the mask the wearer takes a quick, forceful inspiration to determine if the mask seals tightly to the face. For instructions on how to best use the N95 mask or equivalent, refer to the handout provided by the manufacturer, or follow your provincial regulations.

2. How long can one wear?

There are no published data on the length of time the mask is effective for the wearer. Expert recommends masks should be changed if they become wet, interfere with breathing, are damaged or visibly soiled.