A-LevelBiologyInfectious diseasesFeb/Mar 2022Paper 1 Q371 Mark
Which feature of the disease cholera decreases the spread of the pathogen Vibrio cholerae?
AImmunity to cholera after vaccination is short lived, lasting less than two years after vaccination in 50% of people.
BUp to 98% of people infected with Vibrio cholerae are symptomless carriers.
CCholera rapidly kills up to 50% of people with symptoms if they are not treated.
DSimple rehydration therapy successfully treats about 99% of people with symptoms of cholera.
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of infectious diseases within the Biologysyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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