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What happens if rubella IgG is detected in a blood test?

Dr B Shakuntala Baliga MD (AIIMS), FICOG
Professor and Senior Consultant Gynecologist & Colposcopist
Mazumdar-Shaw Center for Cancer Research & Narayana Hrudayalaya Multispecialty Hospital, Bangalore

Q: My blood test report, Rubella IgG was detected. Please let me know about this. I am 23 weeks pregnant. What does this mean?

A:IF IgM for rubella is negative - no need to worry - this IgG positive indicates past infection or could be the result of the rubella (usually MMR) vaccine you had received in childhood.