It was only when the taxi driver made a sarcastic remark that he realised that his shirt was inside out. He took it off, pulled it the right side out, and put it on again. This resident of Deir Al-Balah in central Gaza had just received a phone call from a pharmacy in Rafah notifying him that now they had received a supply of the medicine used to treat his daughter's nervous disorder. He knew he had to get there before the stock ran out, so he snatched whatever clothes were closest to hand. How indescribably happy was this man when finally he returned home with the medicine for which he had been scouring every corner of Gaza. He probably would not have found it in Rafah either had it not been for the tunnels through which vital supplies -- including medicine -- could be smuggled into Gaza from Egypt. More than 90 per cent of the tunnels are being used to smuggle in essential goods and medicines for civilian use.