Scottsdale’s fall air is crisp and clear, but its low humidity quickly dries out the protective lining inside the nose and ...

After conventional wisdom seemed to make peanut allergies worse, a 15-year scientific journey led to “landmark” recommendations that now appear to be reducing their incidence.

For years, doctors warned parents to keep peanuts away from children until they turn three. But that advice backfired. Experts now say delayed exposure helped cause a peanut allergy surge in the U.S.