Question

Explain why there is a delay between the first infection by the pathogen and the appearance of antibodies in the blood.

Answer 1

Answer:

One example of such a delay is the period of clonal expansion where the binding B cells are stimulated to divide by T cells that recognize the antigen–MHC complex on their surface, resulting in a population of clones producing massive quantities of antibodies that target the invading antigen (Kelsoe 1996; Roitt)