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Pollen perennial problem, but it s poorly measured in United States

Pollen perennial problem, but it’s poorly measured in United States By Anthony R. Wood, The Philadelphia Inquirer Published: May 25, 2021, 6:03am Share: 2 Photos Allergist Donald Dvorin collects a pollen sample from a trap on the roof above his practice in Mount Laurel, Pa. It s the first step in a labor-intensive process that evidently isn t appealing to many colleagues these days. (Jessica Griffin/The Philadelphia Inquirer) Photo Gallery PHILADELPHIA He found masses of pollen as thick as “oatmeal,” and once discovered that grains from palm trees had ridden the winds for hundreds of miles to reach his front porch. For 17 years, Timothy Craig intercepted the airborne gametes of trees, grasses, and weeds with a whirling trap, assiduously examined the captives with a microscope, and posted his inferred daily pollen counts for the benefit of science and the allergy-tormented.

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