min age for chicken pox party to ensure immunity

[Katc8910]

I'm reading a lot of posts re the right age for exposure to ensure lifetime immunity. I'm currently looking for CP. What is the minimum age for exposure to CP to ensure immunity? Is 19 months too young? I'm not worried about chickenpox complications, but I also don't want to have to expose my DD more than once.  

[34me]

My DS1 was exposed at exactly 12 months and his sister was 3.5 years. She got them exactly 2 weeks later and he got them 2 weeks after that. So he got them at 13 months. He was exposed over a weekend this past year, including sharing waterbottles at a game and he did not get them. He will be 15 in June. He was the only one on his team (including the one with chicken pox) who had not had the shot.

[SuburbanHippie]

I don't think there is a minimum age for lifetime immunity.  I gave them to my sister when she was only 9 months and she has been exposed since and hasn't caught them.  I know that is anecdotal, but I doubt there would be much concrete evidence on this.