Thanks very much everyone for your thoughtful suggestions. I think I have come to the same conclusion as jollybaby, and the GP was being cautious. One could easily imagine someone going for a sanctioned walk in the park, and then thinking 'Oh, I'll just pop into the caf? for a coffee' or 'I'll just get that thing I need' and being careless. The trouble with the modern GP system is that GPs don't really know their patients so she has no idea whether I'm reasonably sensible or a total twerp. She did, quite rightly, point out that chicken pox can be dangerous not only to pregnant women (who've not had it, I think??) but also to anyone whose immune system is compromised: cancer sufferers and so on. Anyway, am keeping a pretty low profile. I do have to do the twice-daily nursery run but I've got a deal with another mother whose No.2 is also poxy: I lurk with the babies in the carpark, while she picks up the big 'uns. Very suspicious-looking! :) Poor little Twosling looks worse and worse: today is day 4 and he's still getting new spots. His beautiful head is covered in lumpy red blisters, and his fluffy hair is smeary with cream. Big blue eyes are peeking out of swollen, spotty eyelids, but he's still pretty smiley, which is comforting.