Emerging Infectious Disease ISSN: 1080-6059
Volume 15, Number 7—July 2009
Research
Invasions by Eurasian Avian Influenza Virus H6 Genes and Replacement of Its North American Clade
Figure 1

Figure 1. Possible period of invasion from the old hemisphere to the new hemisphere shown in a schematic tree with 2 isolates from the new and 1 from the old hemisphere.
Lessons from the History of Quarantine, from Plague to Influenza A
Length: 23:11





