13th January 2006 at 00:00
KS4 Explain the immune reaction and link this to the way vaccines work. Get students to research the impact of vaccines on the incidence of smallpox, polio, measles and diphtheria.

KS5 Research the way bubonic plague spread in the Middle Ages and how this contrasts with the spread of infectious diseases today. The following web sites are useful for up-to-date information:

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