my son had the vaccine. It has been one year now and he hasn't caught chilcken pox. They say that they could get worst case of shingles when they are adults but so can people who had chicken pox. We have seen and known children with chicken pox all covered in spots, itchy, sore, feverish and absolutely very uncomfortable/misrable. We were not going to put my son through this when there is a vaccine. Unnecessary. At most he will get a fever.