 Identify all members of staff at risk from the significant hazard.  Do not forget people who only come into contact with the hazard infre- quently, e.g. maintenance contractors, visitors, general public and people sharing your workplace.  Highlight those persons particularly at risk who may be more vulnerable,  e.g. trainees and students, pregnant women, immunocompromised patients or staff, people with disabilities, inexperienced or temporary workers and lone workers.