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What is a Hep B titer? A Hep B titer generally refers to a special test known as the Hepatitis B Surface Antibody test. The Hep B test is frequently used to check the blood for evidence of immunity to Hepatitis B. It is not a shot or vaccination and the analysis needs to be performed by a laboratory.
A titer is a measurement of the amount or concentration of a substance in a solution. It usually refers to the amount of medicine or antibodies found in a patientâs blood.edication titers can tell if a person is receiving too much medication. 1  If born on or after January 1, 1957, provide proof of two immunizations for measles at least one month apart or immunity via a blood titer report. ( 2 Persons born before this date are considered immune to measles).