From: Impact of meteorological variation on hospital visits of patients with tree pollen allergy
Counts of tree pollen (grains/m3) | No. of patients | ||||
---|---|---|---|---|---|
 | April | May | June | July | Total |
March | 0.86* | 0.86* | 0.74* | 0.60 | 0.84* |
April | 0.92* | 0.88* | 0.59 | 0.85* | 0.89* |
May | 0.38 | 0.42 | 0.44 | 0.61 | 0.50 |