Medically reviewed by Susan Russell, MD Key Takeaways Lung infections can be caused by viruses, bacteria, or fungi and cause symptoms like cough, fever, and mucus. Most lung infections are treatable ...

About one in 20 people experience bronchitis every year, despite it being a respiratory infection no one wants. Its most common symptoms include wheezing, chest tightness, low fever, fatigue, ...

usually not indicated in healthy nonelderly adults in absence of vital sign abnormalities or asymmetric lung sounds may be warranted in patients with cough lasting > 3 weeks in absence of other known ...