The NIOSH air filtration rating is the U.S. National Institute for Occupational Safety and Health (NIOSH)'s classification of filtering respirators. The ratings describe the ability of the device to protect the wearer from solid and liquid...
An N95 respirator is a disposable filtering facepiece respirator or reusable elastomeric respirator filter that meets the U.S. National Institute for Occupational Safety and Health (NIOSH) N95 standard of air filtration, filtering at least 95% of...
The respiratory protective devices (RPD) can protect workers only if their protective properties are adequate to the conditions in the workplace. Therefore, specialists have developed criteria for the selection of proper, adequate respirators,...
A respirator fit test checks if a respirator properly fits the face of a user. A fitted respirator must be able to separate a user's respiratory system from ambient air. The test involves tightly pressing the mask against the face (without gaps) to...
Mechanical filters, a part of particulate respirators, are a class of filter for air-purifying respirator masks that mechanically stops particulates from reaching the wearer's nose and mouth. They come in multiple physical forms.
HEPA (, high efficiency particulate air, or high efficiency particulate arresting) is an efficiency standard of air filters. A HEPA filter is an air filter meeting such a standard. A HEPA filter must satisfy certain levels of efficiency.
Source control is a strategy for reducing disease transmission by blocking respiratory secretions produced through breathing, speaking, coughing, sneezing or singing. Multiple source control techniques can be used in hospitals, but for the general...
The health and safety hazards of nanomaterials include the potential toxicity of various types of nanomaterials, as well as fire and dust explosion hazards. Because nanotechnology is a recent development, the health and safety effects of exposures...
In epidemiology, a non-pharmaceutical intervention (NPI), also known as a public health and social measure, is a method used to reduce the spread of an epidemic disease without requiring pharmaceutical drug treatments. Examples of non-pharmaceutical...
The following are examples of orders of magnitude for different lengths.
