Smithy I have no immuntuy to Rubella and I have had the injection about 4 times now. I was very scared when I was pg but eventually I told myself I hadn't had the measles (or even come into contact with the measles) for 28 years I would have to be really unlucky to get them in the first 4 months of being pg. That's when the risk is greatest after 20 weeks its ok.