COPD ranked fourth among global killers in 2021
Chronic obstructive pulmonary disease slowly wrecks airways and air sacs until every breath costs more effort. About 213 million people lived with it in 2021, and that year it caused roughly five percent of all deaths—yet quitting smoke and opening airways still change the slope of decline.
COPD is a long-term lung disease that progressively limits airflow and oxygen exchange as airways and tissue are damaged. It cannot currently be cured, but treatment eases symptoms. The label covers chronic bronchitis—ongoing airway inflammation with mucus and cough—and emphysema, where ruined air sacs impair oxygen transfer. GOLD defines COPD by lasting respiratory symptoms that can flare, driven by airway and alveolar impairments often with incomplete airflow reversibility.
Long exposure to irritants drives most cases: tobacco smoke, outdoor pollution, and workplace dust or fumes. Smoke from cooking and heating fuels is a major risk in some regions, especially for women and children. Diagnosis relies on lung-function tests that measure airflow. Care includes inhaled medicines that open airways, pulmonary rehabilitation, oxygen when levels stay low, and—above all—removing the insult, usually by stopping smoking.
In 2021 COPD affected about 213 million people, usually after ages thirty-five to forty, with risk rising thereafter. It was the fourth-largest cause of death that year (~5 percent of deaths); almost ninety percent of deaths under age seventy occur in low- and middle-income countries. Progressive breathlessness is the cardinal, often most distressing symptom; people may lean forward in a tripod posture or purse their lips. Chronic cough can precede formal airflow limits; a productive cough lasting more than three months for two years defines chronic bronchitis. Acute exacerbations lasting days to weeks are often viral—colds cause about seventy percent—and raise risk of further decline.
Source: Chronic obstructive pulmonary disease
