Routine diagnostic work with clinical specimens can be done safely at Biosafety Level 2, using Biosafety Level 2 practices and procedures.
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Reference ANSI Z535 for a complete description on how to use DANGER, WARNING, CAUTION and NOTICE signs, labels or paragraphs. Proper use of ANSI Z535 signs, labels and paragraphs are written into many of OSHA's standards for HazCom and crafted to integrate with ISO symbols. States and local governments also use these standards as codes and laws within their own jurisdictions. OSHA requires the use of proper ANSI HazCom where applicable in American workplaces. hygiene, cleanup or general lab policies). NOTICE is used to identify a non-injury biohazard message (e.g. CAUTION is used to identify a biohazard that will cause injury, but not death. WARNING is used to identify a biohazard that may cause death.