Evening, I'm eight weeks pregnant with baby number two. Should I get my 18 month old son vaccinated against chicken pox or is there minimal risk to me as I've had it. I think possibly twice! I was thinking of letting him get it and build up natural immunity - but saw a thread on a Facebook group about a pregnant mum getting her child vaccinated and I wonder if I should. Not clear from nhs website - it would not appear so. Has anyone?? Thanks