Here is the story: Yesterday, a coffee morning for infos, chat and charity sales. Some toddlers and babies, a few pregnant woman, may be 100 person with wide spread ages. More "me time" kind of thing that a "I have to be there" thing.
One little girl school age, no worries, untill somebody told "Oh you are the little one with chicken-pox".
It is very contagious, and you can't be sure that all the adults here had it, even less the baby.
It think mums who takes their contagious and unwell children to playgroup, party, meetings are plain selfish and don't think about the consequences of their action.
BTH I might be angrier because I caught chicken pox from someone's kid at a diner party because they couldn't find a babysitter. They didn't warn anybody beforehand . I was sick for a month with it had to be on antiviral, very weak, some of my friends even ended up in hospital with it. (all 25+)
I know it is hard to stay at home and you crave human adult contact (my DD was sick a lot for 2 years, so I cancel a lot of things because she was contagious, and I was going slighty insane). But it is unfair the the child who should be resting, and to the people who will catch the disease.
Surely you should contact all the people present first and ask if it OK, no?