title: The OHN is often the worker's "first line of defense" against workplace hazards.
mesh_terms: D004782:Environmental Health; D005260:Female; D006801:Humans; D009784:Occupational Diseases / Q000139:chemically induced / Q000175:diagnosis / Q000517:prevention & control*; D009785:Occupational Health Nursing; D010808:Physical Examination; D011247:Pregnancy; D011248:Pregnancy Complications / Q000517:prevention & control