Respiratory therapists are trained to work with hazardous gases stored under pressure. Adherence to safety precautions and regular maintenance and testing of equipment minimize the risk of injury. As in many other health occupations, respiratory therapists run the risk of catching an infectious disease, but carefully following proper procedures minimizes this risk.
Source: Bureau of Labor Statistics, U.S. Department of Labor, Occupational Outlook Handbook, 2006-07 Edition