Health Library
Trusted information about lung diseases, respiratory conditions, symptoms, diagnosis and treatment.
COVID-19
COVID-19 is an infectious respiratory disease caused by the SARS-CoV-2 virus. Symptoms can range from mild illness to severe respiratory disease and may include fever, cough, sore throat, fatigue, headache, body aches, and shortness of breath. Most people recover without serious complications, but older adults and people with certain medical conditions have a higher risk of severe illness. Learn about COVID-19 symptoms, causes, risk factors, diagnosis, treatment, prevention, complications, and when to see a doctor.
Lung Nodules
A lung nodule is a small, rounded or oval-shaped abnormality in the lung that is usually detected on a chest X-ray or CT scan. Most lung nodules are benign and may result from previous infections, inflammation, or scar tissue. However, some nodules can be associated with lung cancer. Learn about lung nodule symptoms, causes, risk factors, diagnosis, treatment, prevention, complications, and when to see a doctor.