Final answer:
Memory B cells lead to a swift and potent secondary immune response, producing high levels of specific antibodies without the aid of naïve B cells, APCs, or TH cells, potentially preventing infection establishment without noticeable symptoms.
Step-by-step explanation:
The secondary immune response is not mediated by naïve B cells but rather by Memory B cells which are a critical component of the adaptive immune system. During the primary immune response, both antibody-secreting plasma cells and memory B cells are produced.
When an individual encounters the same pathogen in the future, the memory B cells are quickly activated and differentiate into plasma cells without the need for antigen presentation or help from APCs or helper T cells (TH cells), producing high levels of antibodies specific to the pathogen.
This rapid and robust response, higher in both quantity and quality than the primary response, may prevent an infection from establishing, often without the individual noticing any symptoms.