Fig. 4
IgE-reactivity of Artemisia pollen extracts with serum pools from Datong-Shanxi (a), Taiyuan-Shanxi (b), Beijing (c), Yantai-Shandong (d) and Yunnan (e) as determined by ELISA.ImmunoCAP IgE characterization of serum pools is shown in Additional file 1: Table S4. f IgE-reactivity of 142 individual sera to six Artemisia spp is shown as the OD deviation from the average of the six Artemisia spp. Black lines indicate mean OD difference. x/y numbers indicate the number of sera with higher (x) or lower OD (y) than the average of the six species