(OSHA) says Occupational Safety & Health Administration http://www.osha.gov/dts/osta/otm/legionnaires/faq.html OSHA (OSHA) says Legionnaires’ Disease FAQ Â osha. gov/dts/osta/otm/legionnaires/faq.html OSHA recommended by OSHA http://www.osha.gov/dts/osta/otm/legionnaires/faq.html Legionnaires’ disease OSHA has a warning about that