Diseases and immunity — Easy
Recall and familiar applications. Optional hints help you find a first step.
Includes extension practice
Transmission, defences and active immunity after infection/vaccination are required. Antigen-shape mechanisms, memory-cell detail, passive immunity and cholera-toxin/osmotic-diarrhoea mechanisms add standalone-biology content.
Easy, Normal and Difficult describe practice demand; they are not the official Core and Extended tiers.
- Cambridge 0653 syllabus2028–2029 · B10.1.1–8
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