Hello, I have gone through your query and understood the concern. IgG antibody presence indicates past exposure to the infection or vaccination, while IgM antibody presence signifies recent or current infection. In this scenario, the test may be repeated after 2-3 weeks and if there is a rise in the IgG antibody titres, recent infection must be suspected and further management planned accordingly. If there is no rise in tires, regular follow up is to be done with periodic sonograms to detect any anomalies early on. Vaccination should not be done during pregnancy. The baby is also tested at birth for evidence of infection and appropriate management done. Hope this helps.