BLUESTONE / SCIENCE PHOTO LIBRARY BLUESTONE / SCIENCE PHOTO LIBRARY
Asthma attack. Woman on a street using an inhaler to treat an asthma attack. Asthma is a lung disorder which causes attacks of wheezing, breathlessness and coughing. The inhaler dispenses a bronchodilator drug that widens the airways in the lungs, aiding breathing. Asthma usually begins in childhood and improves as the patient matures.
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