Guide to Understanding Infections: The Top 20 Infections Infections are among the most common health concerns, caused by pathogens such as bacteria, viruses, ...

Coughing-Related Signs: What to Watch For and What They Could Mean Coughing is a natural reflex that helps clear the airways of irritants, but persistent or ...

Pneumonia Symptoms Guide What is Pneumonia? Pneumonia is an infection that inflames the air sacs (alveoli) in one or both ...