In a surprise finding, scientists have discovered that histamine, the inflammatory compound released during allergic reactions that causes runny nose, watery eyes, and wheezing ... was made up of ...

A study on natural killer cells in wild mice examines the hypothesis that the unsterile living conditions faced by humans and wild mice may improve the readiness of the immune system to fight new ...

Others get itchy hives or watery eyes ... may seem to start in the nose or the eyes, allergies actually come from an immune system running wild. Learning why these reactions happen can help ...

Nature comes back to life as winter ends and spring and summer arrive, but millions of Americans will start to sneeze, cough and wipe their eyes as spring ... (Photo by Wild Horizons/Universal ...