A-LevelBiologyImmunity9700/12 · May/June 2011 · Q371 Mark
The disease smallpox has been eradicated by a worldwide vaccination programme. Which set of reasons correctly identifies the problems associated with planning vaccination programmes to eradicate other diseases? [Figure: Table with columns 'TB', 'malaria', 'sickle cell anaemia', 'cholera']
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Ainvade gut cells where immune system less effective genetically inherited recessive condition different vaccines needed for active and dormant-to-active forms poor response with malnourished children; boosters then required
Bdifferent stages with different antigens; invades body cells poor response with malnourished children; boosters then required genetically inherited recessive condition different vaccines needed for active and dormant-to-active forms
Cdifferent vaccines needed for active and dormant-to-active forms different stages with different antigens; invades body cells genetically inherited recessive condition invade gut cells where immune system less effective
Dgenetically inherited recessive condition different vaccines needed for active and dormant-to-active forms invade gut cells where immune system less effective different stages with different antigens; invades body cells
✓ Correct answer
C: different vaccines needed for active and dormant-to-active forms different stages with different antigens; invades body cells genetically inherited recessive condition invade gut cells where immune system less effective
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