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Figure 2: Time variation of 7-9 day averages of the pollen count (dashed line). Note that the main peak occurs in autumn and the a second twin peaks occurs in spring. (a) Daily variation of the number of asthmatic patients (solid line). The dashed horizontal lines represnt 189 patients, (b) Time variation of 7-9 day averages of the number of asthmatic patients ((solid line) for comparison with pollen counts.
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