The secondary immune response occurs after an antigen that has already been encountered reappears.
For example, if someone had recovered from the flu and later encounters the
same strain of that virus, antibodies that were made specifically for that antigen will rise dramatically with almost no lag perod.
Secondary Immune Response is more rapid.
Well...
the secondary immune response is faster and stronger than the first. the primary response also takes a few days to react with the antigen whereas the secondary immune response reacts faster to an antigen.
The class of immunoglobulin that is produced in the primary immune response is Immmunoglobulin M (IgM). On secondary exposure, the class that predominates would be Immunoglobulin G (IgG).
Memory B cells are a characteristic part of the secondary immune response. They are formed during the primary immune response and can quickly recognize and respond to a previously encountered antigen by producing antibodies. This results in a faster and more robust immune response upon subsequent exposure to the same antigen.
B-cells differentiate into plasma cells and memory cells in the primary immune response. The memory cells then produce antibodies.In the secondary, memory cells created in the primary differentiate into plasma cells and secrete antibodies immediately. This is a much faster response, explaining why the secondary response causes a person to suffer less or unnoticeably.
A hallmark of immune reponses is memory for specific antigens that have triggered immune responses in the past. Immunological memory is due to the presence of a long- lasting antibodies and very long-lived lymphocytes that arise during proliferation and differentiation of antigen-stimulated B cells anf T cells. Every new encounter with the same anigen results in a rapid proliferation of memory cells. Therefore the antibody titer is far more greater than during a primary response and consist mainly of IgG antibodies. This secondary response.
Primary Immune response: 1) Smaller Peak Response 2) Usually IgM>IgG 3) Lowere average Antibody Affinity Secondary Immune Response 1) Larger Peak Response 2) Relative increase in IgG and under certain situations in IgA or IgE ( Heavy Isotype switching) 3) Higher Average Antibody Affinity ( Affinity Maturation)
Lack of memory B cells for a specific antigen would primarily impact the secondary humoral response. Memory B cells play a critical role in mounting a more rapid and robust immune response upon re-exposure to the antigen during a secondary response.
when it an infection or something gets past the first immune response then your body uses a different response or after immunisation
Memory B cells and memory T cells, which have been previously exposed to a specific pathogen or antigen. These cells can rapidly recognize and respond to the same pathogen upon re-exposure, leading to a faster, stronger, and more targeted immune response. This is the basis for the faster and more effective immune response seen during a secondary immune response.
Following a primary immune response, memory cells are generated from activated B and T cells. These memory cells can recognize the same pathogen if encountered in the future, leading to a faster and stronger secondary immune response. Memory cells are vital for the immune system's ability to provide long-lasting protection against specific pathogens.