HO CHI MINH CITY, Vietnam, Feb. 25 (Xinhuanet) -- A 21-year-old man from Vietnam's northern Thai Binh province, who has received treatment at the Tropical Disease Institute in Hanoi capital sinceFeb. 22, has just been confirmed to contract bird flu virus strain H5N1, raising the total number of infections in the country since December 2004 to 18, local media reported Friday.

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