Immunisation principles and national schedule comparison — formative SAQs

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SAQ 1 (10 marks)

Infant immunisation principles. [1]

1. Conjugate vs polysaccharide. (4) [1]
2. Valid dose rules. (3) [1]
3. Visit steps. (3) [1]

Model answer

Conjugate vaccines enable infant memory; plain polysaccharides perform poorly in early infancy. Invalid early doses are not counted. Reconcile history, give due antigens, document, report and recall. [1]

SAQ 2 (10 marks)

Herd immunity and schedule comparison. [1]

1. Coverage targets. (5) [1]
2. Cross-national schedule differences. (5) [1]

Model answer

High coverage protects those who cannot be vaccinated. National schedules differ by epidemiology and logistics while sharing core immunology. [1]