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. Author manuscript; available in PMC: 2012 Jul 1.
Published in final edited form as: Infect Genet Evol. 2011 Mar 5;11(5):803–811. doi: 10.1016/j.meegid.2011.02.021

Figure 3.

Figure 3

Maximum likelihood tree using concatenated genome sequences of all pandemic (H1N1) 2009 viral strains available in NCBI. Viral strains isolated from April-June, 2009 are colored in blue; July- September, 2009 in red; October-December 2009 in green; January-March, 2010 in purple.