Meningitis can be a frightening diagnosis. Our expert guide breaks down the different types—bacterial, viral, and fungal—and ...

While children under five, particularly those under two, are the most vulnerable, pneumococcal diseases also affect adults.

Symptoms of pneumococcal infection depend on which part of the body is infected. Pneumonia might cause chest pain, cough, and ...

Migraine symptoms are caused by a complex interaction among neurotransmitter chemicals, blood vessels, and nerves in the brain. Learn more about the different symptoms to expect at each stage.