This week we commemorate World Allergy Week (2-8 April), an annual initiative of the World Allergy Organization (WAO) to raise awareness around allergic disease and related disorders. Around 20 percent of the world population suffers from allergic disease (e.g. allergic asthma), and for more than 50 percent of adults and 80 percent of children, their asthma is allergic.
Allergens such as pollen, dust, pet dander and dust mite droppings are common indoors and due to their microscopic nature can easily become airborne, affecting the quality of air that we breathe. You can invest in a good quality air purifier like these ones from Philips but you may be surprised about some of the lesser known materials, foods, or environments that can cause allergic reactions in certain people: