Secondary immune response is mediated by: (A) IgA, (B) IgG, (C) IgM, (D) IgE
Answer is B. Secondary immune response is mediated by IgG, IgM - Primary Immune response, IgA - Secretory Immunoglobulin found in glandular secretions and serum, IgE - Type I HS Reactions Ref : Ananthanarayana textbook of Microbiology 9th edition Pgno : 96-98