Conditions list medically reviewed by George Krucik, MD, MBA
Common colds and influenza are contagious infections that affect the respiratory system. Both are airborne illnesses, spread through coughing and sneezing. Shared…
Learn about what causes allergies, the different types of allergies, and how they're treated.
This feature is for informational purposes only and should not be used to diagnose. Please consult a healthcare professional if you have health concerns.