Which of the following is true about anaphylaxis?

Which of the following is true about

Multiple choice — select the best answer

AIt always develops slowly over several hours
BIt can be effectively treated with antihistamines alone
CIt is a severe allergic reaction that can be life-threatening and requires immediate emergency treatment
DIt only affects the respiratory system

✓ Correct answer: C. It is a severe allergic reaction that can be life-threatening and requires immediate emergency treatment Anaphylaxis is a severe, potentially life-threatening allergic reaction that can involve multiple body systems simultaneously and requires immediate emergency treatment.

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