Which immunoglobulin does the body produce first in response to an antigen?

Question

Quizplus · Accepted Answer

IgM is the first antibody produced by the body in response to an antigen. It is a pentamer and has a high binding affinity, making it effective at agglutination and complement activation. IgA is found in body secretions like saliva, tears, and breast milk. IgG is the predominant antibody in the secondary immune response, and IgE is involved in allergic reactions.

Which Immunoglobulin Does the Body Produce First in Response to an Antigen