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The possible triggers of asthma attack can be exposure to smoke, dust, pollution, fire crackers, cold weather, pollen, moulds, tobacco, smoke, emotional arousal, pet dander, chemical irritants in the workplace, and even certain drugs like aspirin, beta blockers and non steroid anti inflammatory medicines. A study by World Health Organization affirms that around 300 million people presently suffer from asthma worldwide and about 255000 people died of asthma last year.
