Vietnam, the country worst hit by the deadly bird flu that now threatens Europe, plans to complete vaccinating all its poultry in November before periods of high demand for chicken early next year, Reuters quoted the state media as saying. Deputy Prime Minister Nguyen Tan Dung told a mass vaccination meeting on Wednesday the campaign should end by November 15 so poultry could be safely on sale for the Lunar New Year festival in early 2006, the VN Express online newspaper said. "If the vaccination delays to beyond November 15, it will be very dangerous because the winter is the season of flu," the paper quoted Agriculture Minister Cao Duc Phat as saying. Vietnam requires farmers to keep vaccinated birds for 28 days before putting them on sale to make sure the injected birds are healthy. Bird flu has killed 43 people in Vietnam, with 22 of the victims dying since the H5N1 virus, which first swept through much of Asia in late 2003, returned in December 2004. It has also killed 12 people in Thailand, four in Cambodia, three in Indonesia and spread to Kazakhstan and parts of Russia where health workers found mass bird deaths in what could become the first case of the deadly virus spreading to Europe. There have been no reports of human infection in Russia. Vietnam has been vaccinating poultry against bird flu since July 31 in one province in the southern Mekong Delta and another in the north. The Agriculture Ministry said poultry in the remaining 11 Mekong Delta provinces and birds in Ho Chi Minh City would be vaccinated from September. --more 1410 Local Time 1110 GMT