The World Health Organisation has called for calm amid growing concern over the impact of bird flu on Turkey’s tourism industry. WHO doctors say there’s still no sign of human-to-human transmission of the deadly H5N1 strain, and that tourists should still visit the country.However some visitors said they are nevertheless exercising caution. It’s too early to get a clear idea of the impact of bird flu on Turkish tourism. But some travel agencies in western Europe have reported numerous cancellations in recent days. The head of a major hotel group in the resort province of Antalya has also described the situation as “alarming”. Meanwhile the international response to the outbreak is gathering pace. The UN has called for 1.25 billion euros to help fight the virus, which has killed at least two people in eastern Turkey, with another 15 confirmed cases. It’s hoped the money will be pledged at a donors conference in Beijing next week.