An IgA test measures the blood level of immunoglobulin A, one of the most common types

of antibodies in the body. Antibodies (also called immunoglobulins) are proteins the

immune system makes to recognize and get rid of germs.The IgA normal range differs with

age and the IgA normal range for an healthy adult is between 80 – 350 mg/dL.A positive

IgM test indicates that you may have been recently infected or vaccinated and your

immune system has started responding to the vaccination or that your immune system

has started responding to the virus.