Allergen Pictures

I have collected some photos of some major allergen sources for your viewing pleasure.  Pass the mouse pointer over the picture to reveal some text.
Electron microscopy demonstrating a dust mite.
Timothy grass causes significant summertime symptoms.  It is common in the northern USA.
Cottonwood releases fluffy white material, but it is the pollen (too small to see) that cause allergy difficulties.
Ragweed pollen is seen here, magnified per electron microscopy.

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