What is the relationship between Vaccine and white blood cells?

Vaccines stimulate the immune system to recognize and respond to specific pathogens by introducing harmless components, such as antigens or weakened forms of the pathogen. This exposure prompts white blood cells, particularly B cells and T cells, to produce antibodies and mount a targeted immune response. As a result, the immune system develops a memory of the pathogen, enabling it to respond more effectively if exposed to the actual disease in the future. Thus, vaccines play a crucial role in training white blood cells to protect the body against infections.