The first link in the chain of survival from cardiac arrest is best demonstrated by which one of the following?
A) A patient in cardiac arrest arrives at the emergency department within 30 minutes.
B) A bystander recognizes cardiac arrest and calls 911.
C) A trained layperson begins CPR.
D) An EMR arrives on the scene with an AED.
B
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An anaphylactic reaction can be described as a severe ____________________reaction
Fill in the blank(s) with correct word