Code Gray

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A message announced over a hospital’s public address system, indicating the need for an emergency management response to
(1) A combative person with no obvious weapon
(2) Real or perceived act of terrorism from conventional, nuclear, biological or chemical agents, or other security emergency
(3) Severe weather
(4) Severe air pollution
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References in periodicals archive ?
I have recently started a job as a nurse in a large hospital and I am shocked at the amount of verbal abuse and threats that my colleagues tolerate because of the paperwork they will have to ill in if they call a code grey.