What does it mean to test positive for the igg antibody to rubella virus?

Immunity: Having IgG antibody to rubella indicates that you have developed immunity to the virus either through prior exposure or vaccination.

+ IgG for Rubella: A + IgG for rubella virus means that you've either had a previous viral infection or that you have been immunized against the virus. In either case you have developed immunity to this particular virus, and being exposed the virus in a future pregnancy should not provide a risk to you baby. Rubella in pregnancy poses a significant risk to the fetus in early pregnancy.

You Are Immune: Igg is the long term antibody that protects you against bacteria and viruses. If you are IgG positive, you protected from getting a rubella infection.

Immune: You have immunity to rubella most likely because of a vaccine you received as a child. Therefore, you cannot get rubella which can cause serious problems for the fetus.