HIV kills or damages the body's immune system cells. AIDS is the most advanced stage of infection. Learn more about the symptoms and treatments, causes, diagnosis and preventions

Have you ever had an unexplainable allergy that has made you miserable? It could be moulds. These moulds are sometimes microscopic, so there is seldom you can do to avoid them.

Dust mite allergy is an allergic reaction to tiny bugs that commonly live in house dust. Signs of dust mite allergy include sneezing and runny nose. Many people with dust mite allergy also experience

Systemic lupus erythematosus (lupus) is a disease of the immune system. Normally, the immune system protects the body from infection.

A drug allergy is an allergic reaction to a drug or medication. An allergic reaction means that your immune system identifies the drug as foreign and acts to eliminate it from your body. Your immune s