Allergic response produce histamines. These histamines will act on different areas of the body (eyes, throat, nose, gastrointestinal tract, skin or lungs) to produce symptoms of an allergic reaction. The allergic response is not limited to a certain amount of exposure. If the body is exposed to the allergen multiple times the immune system will react every time the allergen is present. The reason why people get allergies is not known. The allergens are not passed down through generations. It is believed if parents have allergies the child is more likely to be allergic to the same allergens. Some common symptoms include
National Pollen and Aerobiology Research Unit £7m. It is situated in the west of Worcester, off the A443 and north of the Three Choirs Way. National Pollen and Aerobiology Research Unit The National Pollen and Aerobiology Research Unit or NPARU is a research institute in Worcester. It produces the UK's pollen count, and was the world's first pollen forecasting service. Aerobiology is the study of organic particles and organisms in the atmosphere. The National Pollen and Hayfever Bureau was founded in Norwich on 21 April 1983. Forecasts for Britain's six million sufferers of hay fever (allergic rhinitis) began from 1 June 1983; it was funded by