CAIE A Level Biology 9700 · Infectious diseases
Four infectious diseases – cholera, malaria, tuberculosis, and HIV/AIDS – pose significant public health challenges worldwide. For each disease, describe the type of pathogen (including the name of the specific causative organism) and the main route of transmission. In addition, for any one of these diseases, describe one biological factor that is important when planning prevention and control strategies.
5 marks, so the mark scheme is looking for about 5 separate creditworthy points. Making the same point twice in different words earns it once.
Describe means: Say what happens or what something is like, in order and with detail. You are not being asked why. If there is data, quote it: name the trend, then give figures with units at the points where it changes.
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