The most common allergens generally include the various gases produced as a result of burning fossil fuels, components of pesticides, insect sprays, paint or tar and even smoke besides the wide variety of bacteria, viruses, pollen, mites and mould already present in the air.
As mentioned before the indoor air pollution often proves to be more dangerous for people prone to allergies. This is because, the allergens contained in the indoor air have far lesser space to disperse and get decimated in a natural manner. On the contrary, the allergens present in indoor air are often found to be more potent and significantly greater in numbers than the ones present in outdoor air. The best way to get rid of these allergens in an effective manner is for the people to invest in a good quality home air purifier capable of eliminating a wide variety of pollutants and allergens.