![Breath shortness blue gradient concept icon. Pneumonia sign abstract idea thin line illustration. Coughing with mucus production. Reducing lung function. Vector isolated outline color drawing 5654747 Vector Art at Vecteezy Breath shortness blue gradient concept icon. Pneumonia sign abstract idea thin line illustration. Coughing with mucus production. Reducing lung function. Vector isolated outline color drawing 5654747 Vector Art at Vecteezy](https://static.vecteezy.com/system/resources/previews/005/654/747/original/breath-shortness-blue-gradient-concept-icon-pneumonia-sign-abstract-idea-thin-line-illustration-coughing-with-mucus-production-reducing-lung-function-isolated-outline-color-drawing-vector.jpg)
Breath shortness blue gradient concept icon. Pneumonia sign abstract idea thin line illustration. Coughing with mucus production. Reducing lung function. Vector isolated outline color drawing 5654747 Vector Art at Vecteezy
![NIH on Twitter: "#COPD is a chronic lung disease that makes breathing difficult. It can cause coughing that produces large amounts of mucus, wheezing, shortness of breath, chest tightness, and other symptoms. NIH on Twitter: "#COPD is a chronic lung disease that makes breathing difficult. It can cause coughing that produces large amounts of mucus, wheezing, shortness of breath, chest tightness, and other symptoms.](https://pbs.twimg.com/media/Dm0mLErWsAIeFFb.jpg)
NIH on Twitter: "#COPD is a chronic lung disease that makes breathing difficult. It can cause coughing that produces large amounts of mucus, wheezing, shortness of breath, chest tightness, and other symptoms.
![Biomedicines | Free Full-Text | Biological and Genetic Mechanisms of COPD, Its Diagnosis, Treatment, and Relationship with Lung Cancer Biomedicines | Free Full-Text | Biological and Genetic Mechanisms of COPD, Its Diagnosis, Treatment, and Relationship with Lung Cancer](https://www.mdpi.com/biomedicines/biomedicines-11-00448/article_deploy/html/images/biomedicines-11-00448-g001.png)