signs of lung disease

COPD Symptoms: What They Mean

Knowing the facts about lungs will help you understand why COPD—chronic obstructive pulmonary disease—can be difficult to diagnose until it is quite advanced. The lungs, with more than 300 million alveoli, have an amazing capacity. Not all of these alveoli are used for the day-to-day work of normal breathing—the extra … Read More

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