What is valley fever? Valley fever is a disease caused by a fungus that gets into your body through your lungs. It can make you feel like you have a cold or the flu and may cause a rash. Most people get better without treatment. But if your body's natural defense system (immune system) is weak, valley fever can be...
Provides links to information about the immune system. Includes info about immunizations, HIV and autoimmune disorders, arthritis, and multiple sclerosis.
Briefly discusses how the heart works and what might cause minor or serious heartbeat changes. Offers interactive tool to help decide when to seek care. Also offers home treatment tips.