Most Helpful Guy
Why would she be shocked? Chicken Pox is highly contagious.
I suppose you could tell her that on the bright side if she does get it, she'll never, ever get it again. Since you can only get chicken pox once in your life once you get it your body develops anti-bodies agaisnt it.
Most Helpful Girl
Why is she mad? It’s better to get it now when you’re young than as an adult and once you’ve had it, you’re done.