Isabella and (not) Chicken Pox

Here is an email  my wonderful-mom sister-in-law had a few months ago with my brother Jeff about my niece Isabella...

Hi!  Remember last night I was telling you I was impressed that Isa knew so much about 'something?'  Chicken pox!  We were talking about being sick and she mentioned chicken pox."                    

"What is chicken pox?"  

Isa:  "Chicken pox is when you don't feel too well and you have tiny red spots all over your face." 

Claudia:  "Oh, so what should you do when you have chicken pox?"  

Isa:  "You need to stay in bed a long time."  

Claudia:  "And after staying in bed for a long time what happens?" 

Isa:  "You get all better, but you have to drink a lot of water!"  

Claudia:  "Oh, I remember when I was a little girl like you, and I got chicken pox, and I had to stay in bed for a long time and I couldn't go to school."  

Isa:  "Yeah, when I was a little girl like you I had chicken pox and I couldn't go to school either."  

Claudia:  "Oh, you remember when you were a little girl?"  

Isa:  "Yeah"  

Then she got dressed.  I asked her if she felt sick and then she said, "A little, but I don't have chicken pox! See? (points  to her face) I don't have spots on my face!"