What Is an IgM Antibody?
An IgM antibody, or an immunoglobulin M antibody, is one of the five types of antibodies the body produces in response to invading antigens. Antibodies are proteins found in body fluids, such as blood and saliva, which help the immune system fight off infection. They are always specific, which means, that for each type of antigen a corresponding specific antibody is also produced. Antigens are substances that are considered foreign to the body and whose presence often trigger the production of antibodies. Examples of antigens are viruses, fungi, parasites, and bacteria.
