Bird flu has killed 350 white-winged ducks in northern Vietnam this week, the first outbreak in poultry detected this year, the government said on Thursday. The virus was found at a farm raising two-month-old ducks in Thai Nguyen province and animal health workers slaughtered all the remaining birds there to prevent it spreading, the Animal Health Department said in its daily report. Last month, the H5N1 bird flu virus killed a four-year-old boy from an ethnic minority group in the northern province of Son La, Vietnam's first human case in nearly five months. At the same time, the government also said the virus had hit hundreds of ducks and chickens in the Mekong Delta province of Tra Vinh in the south. The province is still on the government's bird flu watchlist, along with Thai Nguyen, Reuters reported.
