Help!

I haven't posted here for ages cos we have had a really bad tummy bug doing the rounds in the house for the last month. We can't seem to get rid of it. It goes away for a few days, then just when you think you have finally seen the back of it, its back. Hubby has been laid up for the last four days with his second attack of it, DD2 was off school for three days the week before, DD1 for two days the week before that and now I seem to be getting it again too. The only one who seems to have escaped so far is DS and that is most likely because he is a 15 yr old boy so rarely comes out of his room. My friend Alison thinks I should put up a sign with Unclean! Unclean! on it on the front door and I am starting to think it might come to that.

Anyone any old cures for a tummy bug????

Anyone??