"You can NOT catch chicken pox from a third party. You can only catch chicken pox from someone else with chicken pox, so HerScaryness's colleague will have had chicken pox, even if she didn't develop the spots. If you are immune to it, you cannot 'carry' it. You can however, rarely, not become immune to chicken pox the first time you get it and so get it again later on."
Bollocks. Sorry but I was THERE! Dr told me the same, but my colleague was NOT sick, He never developed a single spot, nor any other symptom. he WAS carrying it. He himself had had CP as a child. He was in his 30s when I caught CP from him.
The only person I have ever met with CP was my son. and that was a couple of years ago. HE got it from a girl at nursery. SHE wasn't sick, not at all, not a spot, not a day off, nothing. Her baby BROTHER (who DS never met) was however covered in spots from head to toe.
If you have an illness that doesn't develop in you, but that you can pass on to others who have not had it before and have no immunity to it, it is clearly CARRYING the illness.
CP IS a dangerous illness to some. For that reason, keep kids at home for a week, then review the spots. We have mums here that have lost their DC due to CP, so FFS, a few bored days is nothing, go rent some DVDs or get them out in the garden. Take em out for a drive to the middle of no-where if you must, but don't mix with people. It's not fair.