Figure 2

RT-PCR curve of influenza A/H5 subtype. The RT-PCR curve of influenza A/H5 subtyping: (a-positive control, c, and b-positive samples all showing exponential rise in the graph; d-negative control and all other lines without exponential rise were negative). The cycle threshold (CT) for both positive control and positive samples is 25 as shown in the x-axis.