Figure 2
From: Impact of antigenic and genetic drift on the serologic surveillance of H5N2 avian influenza viruses
Examples of yearly trends in hemagglutination inhibition (HI) titers of low pathogenic Avian Influenza H5N2 viruses isolated in Mexico between 2002 and 2008. This figure depict results of the HI test using antiserum produced with the reference antigen A/Ck/México/CPA-232/1994 or antiserum produced with a recent field isolate A/Ck/México/2008. Geometric mean values ± SE are presented. The complete dataset is included in Table 2.