A health worker collects blood from a patient at an HIV/AIDS consulting centre while U.S. Health Secretary Mike Leavitt visits the centre in Vietnam's northern Hai Phong City, 92 km (57 miles) east of Hanoi October 15, 2005. Leavitt and a contingent of U.S. and World Health Organization flu experts are visiting affected southeast Asian nations this week and diplomats are working to make better alliances for sharing information quickly about any human outbreaks. HALTH REUTERS/Kham