EFFECT OF EARLY LIFE EXPOSURE TO AIR POLLUTION ON THE DEVELOPMENT OF CHILDHOOD ASTHMA
CHAPTER ONE INTRODUCTION Background of the study Asthma is a chronic inflammatory disease of the airway which has a large impact on quality of life and poses a great burden on health services. In children, asthma is the most commonly reported chronic disease in developed countries. Environmental factors, importantly including improved hygiene, ambient air pollution exposures, and early-life exposures to microbes and aeroallergens, contribute to the development of asthma. In ...
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