responsive - answering; reacting quickly and positively, bystander - one who is present but not taking part in a situation, pertinent - relevant or on topic, symptoms - physical or mental signs of an illness or condition, allergies - damaging immune responses by the body to different substances, AED - automated external defibrillator; a portable electronic device, compressions - the action of pressing or causing pressure, CPR - cardiopulmonary resuscitation  , consent - permission, conscious - awake and aware, EMS - emergency medical services,

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