CAIE IGCSE Biology 10.1.10 Active Immunity Is Gained After Questions
Infection by a pathogen and vaccination can both lead to active immunity.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Exam points
- state that active immunity is gained after infection by a pathogen or vaccination
CAIE IGCSE Biology 10.1.10 Active Immunity Is Gained After Questions question 1
[Maximum number: 4]
Cholera is a transmissible disease.
Question (a)
(a)
A study was designed to test the effectiveness of a cholera vaccine in an area where outbreaks of cholera occur frequently.
The doctors gave some people in this area the new vaccine.
Question (i)
(i)
Explain why the people were not protected from cholera immediately after receiving the vaccine.
any three from:
idea that the immune response takes time to occur ;
lymphocytes release antibodies ;
ref. to (lymphocytes) produce specific antibodies to the (cholera) antigens / AW ;
memory cells (form) ;
long-term immunity ;
Question (ii)
(ii)
The doctors ensured that the people who received the new vaccine had not had cholera before.
Suggest why.
idea that they did not have (active) immunity / memory cells before the start of the study / AW ;
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