“…A cross‐sectional study has shown that overall, while about 11.3% of patients in China with respiratory allergies are sensitized to Artemisia pollen, this value is much higher in Northern China (>50%). Among the major pollen species causing seasonal allergic asthma in China, Artemisia pollen has the highest association index . The hop ( Humulus scandens ) , ragweed ( Ambrosia artemisiifolia ), and goosefoot ( Chenopodium album ) pollen seasons overlap with that of Artemisia , but their IgE positive rate was significantly lower in a survey of a large number of ImmunoCAP tests in Beijing .…”