Your doctor will likely measure your IgE levels if you have a blood test to check for allergies. Doctors often measure IgA, IgG, and IgM together to get a snapshot of your immune function.

IgG antibodies are the most common kind and IgM antibodies are the first kind that your body makes when you first come into contact with a virus or bacteria. Both can be found in your blood and ...

Illustration of the five major antibody (immunoglobulin) types: IgG, IgE, IgD, IgM, and IgA, each with its unique structural configuration and functional properties. Image Credit: gritsalak ...