2. CDC - Respirators - NIOSH Workplace Safety and Health Topic
Respirators protect the user in two basic ways. The first is by the removal of contaminants from the air. Respirators of this type include particulate respirators, which filter out airborne particles; and "gas masks” which filter out chemicals and...
Centers for Disease Control and Prevention

3. CDC Features - What You Should Know about Using Facemasks and Respirators
Very little is known about the benefits of wearing facemasks and respirators to help control the spread of influenza. In the absence of clear science, this information offers a "best estimate" to help guide decisions.
Centers for Disease Control and Prevention

4. Artificial Limbs: MedlinePlus
Circulation problems from atherosclerosis or diabetes, resulting in amputation; Traumatic injuries, including from traffic accidents and military combat; Cancer;
MedlinePlus (Offsite)

5. Respirators
Respiratory protection must be worn whenever you are working in a hazardous atmosphere. The appropriate respirator will depend on the contaminant(s) to which you are exposed and the protection factor (PF) required. Required respirators must be NIO...
www.osha.gov

6. Facemasks & Respirators
Facemasks and N95 respirators may help prevent the spread of germs from one person to another. Facemasks and N95 respirators may help prevent the spread of germs from one person to another.
pandemicflu.gov

7. Masks and N95 Respirators
About Facemasks and N95 Respirators; Facemasks; N95 Respirators for Use by the Public; N95 Respirators in Industrial and Healthcare Settings;
www.fda.gov

8. Voluntary Use of Respirators
Employers who allow their employees to wear respirators on a voluntary basis when not required by OSHA or the employer must implement limited provisions of a respiratory protection program. When a filtering facepiece respirator is all that is used...
www4.uwm.edu

9. Powered Air-Purifying Respirators
For about 25 years, powered air-purifying respirators have been used whenever workers were exposed to a high level of contamination or required a higher assigned protection factor.
www.nsc.org

10. Artificial organs, artificial heart
If you had severe heart failure for a while before getting the TAH, your body may be weak and your lungs may not work very well. Thus, you may still need a
www.nhlbi.nih.gov