Oh, I do sympathise! My immune system is terrible as I am asthmatic and have to take antibiotics at the first sign of a cold going down on to my chest as it could easily turn into bronchitis or pneumonia, which I have had once and wouldn't want to repeat. I still have a nasty chest/sinus virus which I picked up at the British Museum (which was packed with tourists) 5 weeks ago. To make matters worse, it's one of those viruses which seems to be getting better and then gets worse again. It also seems to morph into various other symptoms. So far I have had: a high temperature, which only lasted one day, a persistent cough, blocked sinuses, aches and pains like flu ( I have had my flu jab) wheezing, and a constant sweaty feeling. My brother-in-law, who lives in Berlin has the same symptoms exactly, so it must be an international bug! I took the antibiotics about two weeks in to stop it going on to my chest, but although they did stop that happening, the virus still goes on its merry way in other parts of my body! I am terrified of travelling now as I always seem to pick up something and, yes, I do use First Defence. We are going away soon and i am contemplating using a face mask on the plane as well as the FD!