Magnified pollen grains under the light microscope. Grains of pollen often cause allergic reactions to the antigens embedded on the outer casing of microscopic grains. Hay fever and pollinosis. Photo.

Magnified pollen grains under the light microscope. Grains of pollen often cause allergic reactions to the antigens embedded on the outer casing of microscopic grains. Hay fever and pollinosis. Photo. - 144075870

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