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What is an immunoglobulins blood test? This test measures the amount of immunoglobulins, also known as antibodies, in your blood. Antibodies are proteins made by the immune system to fight disease-causing substances, like viruses and bacteria. Your body makes different types of immunoglobulins to fight different types of these substances. An immunoglobulins test usually measures three specific... https://medlineplus.gov/lab-tests/immunoglobulins-blood-test/
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