is that your fault........... you maybe should have had another week on holiday......just to clear the "bug" maybe you could have claimed on your insurence, i know our friends like us to "bring something back" but surely not that.
Flying won't help. You only need one or 2 people with the bug brewing and that's a plane load down with it within a few days of their holiday starting. If it was me going I'd dose myself up before getting on the plane just to build up the resistance.