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. Author manuscript; available in PMC: 2015 Jun 26.
Published in final edited form as: Vaccine. 2005 Jan 19;23(9):1144–1148. doi: 10.1016/j.vaccine.2004.08.028

Fig. 2.

Fig. 2

a) Correlation between influenza seasonal severity (see text) and hemagglutinin antigenic drift, calculated by epitope analysis. Least-squares regression analysis yields the linear fit y = 1.5425 + 5.9162 pepitope, with a correlation coefficient R = 0.54432. b) Correlation between influenza seasonal severity (see text) and hemagglutinin antigenic drift, calculated by whole sequence analysis. Least-squares regression analysis yields the linear fit y = 2.0041 + 11.684 psequence, with a correlation coefficient R = 0.2183.