The B lymphocytes (antibodies) and the T lymphocytes.
Explanation:
Imitating an infection is the process by which a vaccination develops immunity. However, this kind of infection never leads to illness, it does make the immune system to generate B lymphocytes and T lymphocytes. The produced B and T lymphocytes are the memory cells, which remembers to fight against the disease in the future.
<span>Vaccines help develop immunity by imitating an infection. but it does cause the immune system to produce T-lymphocytes and antibodies. Sometimes, after getting a vaccine, the imitation infection can cause minor symptoms, such as fever.</span>
