I wish that someone at Bravo had recognized how dangerous it is to public health to give an anti-vaxxer a whole hour of primetime TV in which to (a) express her antisocial views and (b) seek out others who share them and let them also enjoy part of her platform. The only people in the episode who countered Christian on the vaccination question were her aunt who thinks the virus is "e-BOW-lye" and her friend who thinks breastfeeding is gross.
The episode left it open-ended, but I assume Christian's attitude to vaccinating Eleanor changed when it occurred to her that there would be another child in the house that could also be endangered if she falls ill. It's one thing if all you think you're risking is some stranger's kid being hospitalized after getting infected by Eleanor's totally normal, "fun" chicken pox; but Baby Axness is probably more precious?