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. 2010 Oct 18;39(1):e4. doi: 10.1093/nar/gkq909

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© The Author(s) 2010. Published by Oxford University Press.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.5), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 6. — Comparison of predominant influenza A (H3N2) strains, WHO vaccine strain recommendations and strains identified by AD plot analysis. For the AD plot analysis, seasons with antigenic cluster transitions are shown in color. The information shown for the AD plot and the WHO recommendation represents the selection made 1 year earlier.