- Adaptive immunity leads to cells that are infected by viruses being killed, resulting in immune memory which is the basis of vaccination.
(a) Distinguish between innate and adaptive immune response. [1]
(Question 5 continued)
The graph shows the magnitude of the immune response after infection or after vaccination over time.
(b) Explain reasons that the T-cells peak before the antibodies after primary infection or vaccination, but T-cells peak at the same time as the antibodies after secondary infection or primary infection following vaccination. [2]
(c) Different types of vaccine are used to prevent viral diseases. Justify this statement in terms of the structure of viruses. [2]