CAIE IGCSE Biology 10.1.10 Gaining Active Immunity
Practise explaining how infection or vaccination stimulates specific antibodies and memory cells for future protection.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Exam points
- identify recovery from infection and vaccination as routes that stimulate active immunity
- explain that antigen exposure activates lymphocytes to make specific antibodies and memory cells
- contrast the delayed, longer-lasting active response with immediate, short-lived passive antibody transfer
10.1.10—Active immunity is gained after 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.
[ 4 ]
Question (i)
(i)
Explain why the people were not protected from cholera immediately after receiving the vaccine.
[ 3 ]
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.
[ 1 ]
idea that they did not have (active) immunity / memory cells before the start of the study / AW ;
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