Migration and Persistence of Human Influenza A Viruses, Vietnam, 2001–2008 - Vol. 19 No. 11 - November 2013 - Emerging Infectious Disease journal - CDC
Volume 19, Number 11—November 2013
Migration and Persistence of Human Influenza A Viruses, Vietnam, 2001–2008
Understanding influenza dynamics in tropical regions is crucial for understanding global influenza epidemiology because dynamics between temperate and tropical regions are closely linked. Phylogenetic studies have supported eastern Asia, Southeast Asia, and the tropics as potential ecological sources of global influenza circulation (1,2), but others have suggested a variety of geographic regions as potential sources (3–5). Consequently, the role played by the tropics in the global epidemiology of influenza is still uncertain. Viral gene sequence data from tropical countries are crucial for understanding virus migratory routes within the tropics and between tropical and temperate countries.