Normally, I like to include lab studies for evaluation of patients with chronic infections. It’s very important to find out if your body can make the right amount of antibodies to fight infection. But…there’s always the exception. In this case, IgA can be absent from your bloodstream and not cause a problem because it’s gone. In short, I call this asymptomatic IgA deficiency (you should see the long version). The link below comes from the American Academy of Allergy, Asthma, and Immunology–good stuff and easy to understand if you’re interested.