What is an Antibody Titer?

What is an Antibody Titer?

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By Dr. Sanchari Sinha Dutta, Ph.D.Reviewed by Emily Henderson, B.Sc.

An antibody titer is a type of blood test that determines the presence and level (titer) of antibodies in the blood. This test is carried out to investigate if there is an immune reaction triggered by foreign invaders (antigens) in the body.