MMR Antibody Titer

A titer is a laboratory test that measures the amount of antibodies present in a person’s blood. It can be used to determine if a person has had any previous infections, and whether there is a current immunity. Certain employers and guidelines require candidates and employees to undergo titer testing as part of their vaccination policies.

An MMR titer test measures the levels of antibodies for three viruses: measles, mumps, and rubella. A positive result typically indicates immunity due to a prior exposure or previous vaccination.