Immunology

2014's famous 'pollen vortex' didn't happen

Last year's long, harsh winter was brutal, and caused some experts to predict the "polar vortex" would turn into the "pollen vortex," and make allergy sufferers more miserable than ever before. But the "pollen vortex" didn't ...

Vortex

A vortex (plural: vortices) is a spinning, often turbulent, flow of fluid. Any spiral motion with closed streamlines is vortex flow. The motion of the fluid swirling rapidly around a center is called a vortex. The speed and rate of rotation of the fluid are greatest at the center, and decrease progressively with distance from the center.

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