Step-by-step explanation
When an attenuated vaccine is given to an individual, a humoral immune response is initiated in this patient.
The humoral immune response is divided into primary and secondary humoral responses. This type of immune response is mediated by B and T lymphocytes and remember that a repeated infection due to the same damage activates the memory lymphocytes created as a consequence of the primary humoral response.
we can conclude that the correct answer is:
Answer:
C. to trigger the production of memory B&T cells that will protect against future infection of this virus.