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, ...

Bronchiolitis often affects infants under 2 and is usually caused by the respiratory syncytial virus (RSV). Bronchitis can happen at any age and involves inflammation due to viral infections like ...

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 ...