A sharp lesson.
D000062:Accidents, Occupational / Q000523:psychology*; D000163:Acquired Immunodeficiency Syndrome / Q000175:diagnosis / Q000517:prevention & control / Q000635:transmission; D005239:Fear; D006801:Humans; D009339:Needles; D009740:Nursing Staff / Q000523:psychology*; D014951:Wounds, Stab / Q000523:psychology*