What is the definition or description of: rubella titer?

Blood test: A rubella titer measures whether you are having, have had , or never had 3 day measles, or have had the vaccine. It measures antibodies in your blood to make this determination. It can be a serious disease for a fetus if the mother gets the disease during pregnancy.

Rubella antibodies: Rubella titers- blood test for rubella antibodies. In an adult or child, the presence of igg rubella antibodies means that the person likely has been exposed to the rubella virus in the past or been vaccinated and is protected against it if the level is high enough. In a newborn until 6 months of age rubella igg antibody are maternal origin.