Thank you for your bravery on here SassySusan, Mrs Devere and Shabba.
I am so very sorry for your losses.
And sorry you have had to put up with ignorant arses.
I have been on other similar threads on MN about this topic, and it has always ended with SGB and the 'who cares' brigade seeming to win the argument.
I am SO glad that finally there is a sensible chickenpox thread on here.
I thank you for sharing with us.
I got CP when I was 7 months pregnant with precious firstborn.
I was very sick - hallucinating, fever...
The stupid family member who invited kids with CP to a family function and didn't think to warn me (or anyone else) actually came over and barged in to my room.
She didn't believe I was sick. 
I am so lucky that PFB and I survived. I was on bedrest til the end of my pregnancy so he didn't come early - he may not have survived.
There are no words I can say to you women who have shared about your precious children.
I do believe that by sharing here, it will make a difference.
And I am now unapologetically a confront CP parents person.
They need to know the risks.
It is selfish.