“…A variety of inexpensive respirators, such as the commonly used NIOSH-certified N95 respirator that is designed to filter at least 95% of airborne particles, are readily available. 60,118,119 b. Nonsterile gowns Gowns provide better barrier protection than laboratory coats. This includes a medical evaluation of the user, annual fit testing of the respirator on the user, and training in proper use.…”