Add Yahoo as a preferred source to see more of our stories on Google. Did you know that a single ragweed plant can produce 1 billion grains of pollen in a season? Or that most pollen that causes ...

Spring has arrived, and pollen levels are already on the rise across the Triangle, bringing a familiar yellow coating to cars, sidewalks and outdoor surfaces. According to the latest pollen count, ...

Spring means beautiful flowers, fragrant lilacs – and lots of tree pollen coating cars and setting off sneezing, wheezing and headaches. As an allergist and immunologist at the University of Colorado ...

Did you know that a single ragweed plant can produce 1 billion grains of pollen in a season? Or that most pollen that causes allergy problems is so small that it is invisible to the human eye? From an ...