During the “hay fever season,” newspapers in many cities publish the day’s pollen count: What is pollen, what does it have to do with hay fever, and what is a pollen count?

A person is said to have hay fever when he is sensitive to pollen and some other sum stances that are present in the air. Pollen is the reproductive element of plants and is contained in the flowers of most plants. Usually, it occurs as a fine dust or grains.