CAIE A Level Biology 9700 · Infectious diseases
A remote village in a low-income country has experienced a cholera outbreak caused by the bacterium Vibrio cholerae. The local health authority is considering a project to provide a clean water supply to the village as a control measure.
Outline the biological, social and economic factors that justify the use of clean water provision as an effective method for preventing and controlling the spread of cholera.
6 marks, so the mark scheme is looking for about 6 separate creditworthy points. Making the same point twice in different words earns it once.
Outline means: Give the main points briefly. Less detail than describe, but every key step has to be there. One short line per step, in order. The marks are for coverage, not depth.
Written by Markquill to follow the Cambridge International syllabus. Markquill is independent and is not affiliated with or endorsed by Cambridge International.