Before pregnancy, it is generally necessary to undergo eugenic prenatal tests, and the rubella virus test is one of them. If the test shows that rubella virus IgG antibodies are elevated, this indicates that the patient has previously been infected with the virus or has been vaccinated against the rubella virus, and antibodies have been produced in the body, providing immunity to the virus. Therefore, when a rubella virus IgG is detected, the patient does not need to be particularly worried, as this result does not affect a normal pregnancy. Regardless of whether or not one has been vaccinated against rubella, it is advisable to avoid contact with children infected with rubella during early pregnancy to prevent contracting the rubella virus, which can affect the growth and development of the fetus.