Measles (Rubeola) Antibodies, IgG

Aid in the determination of the serological status to the measles virus. A positive result generally indicates exposure to the measles virus or previous vaccination. A positive result is considered adequate laboratory evidence of measles immunity. Persons with an equivocal serologic test result do not have adequate presumptive evidence of immunity and should be considered susceptible unless they have other evidence of measles immunity.

Documented age-appropriate vaccination supersedes the results of subsequent serologic testing. If a person who has two documented doses of measles-containing vaccine is tested serologically and is determined to have negative or equivocal measles results, it is not recommended that they receive an additional dose of vaccine. These individuals should be considered to have presumptive evidence of immunity.