From: World Allergy Organization Study on Aerobiology for Creating First Pollen and Mold Calendar With Clinical Significance in Islamabad, Pakistan; A Project of World Allergy Organization and Pakistan Allergy, Asthma & Clinical Immunology Centre of Islamabad
Fagus sylvaticus
409, 000, 000
Betula alba
5, 562, 400, 000
Alnus species
7, 269, 300, 000