Vaccines · Pharmacology

Polysaccharide vaccines are generally less effective in children under two years because they:

  1. Are rapidly degraded
  2. Do not stimulate T-cell dependent immunity
  3. Cause severe adverse effects
  4. Require cold storage
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Correct answer: Do not stimulate T-cell dependent immunity

Polysaccharide vaccines produce a T-cell independent immune response. Young children have immature immune systems that respond poorly to T-cell independent antigens. Conjugate vaccines overcome this limitation.

Difficulty: Medium Question 9 of 25

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