Which antibody is first to be released in to blood following an infection
A
IgD
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B
IgG
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C
IgM
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D
IgA
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Solution
The correct option is C IgM Immunoglobulin M (IgM) is one of several forms of the antibody that are produced by vertebrates. IgM is the largest antibody and it is the first antibody to appear in the response to initial exposure to an antigen in the blood. IgM antibodies appear early in the course of an infection and usually reappear to a lesser extent after further exposure to the same antigen. IgM antibodies do not pass across the human placenta.