Cold virus "prefers cold noses"

A key to keeping a winter cold from getting worse is to keep your nose from being exposed to too much cold air.

Researchers at Yale University found that not only is the body's immune system less effective in cold weather, but that the temperature of  your nose can play a big part in how much sneezing you do.

The scientists tested the rhinovirus—one of the main culprits of runny noses and sneezing—at the standard nose temperature (33 degrees C) and at standard body temperature (37 degrees C). They found that the virus was more easily replicated in the lower nose temperature compared to the warmer body temperature. The research team also discovered that sensors for identifying infection and chemicals that trigger an immune reaction by the body did not work as well in the colder temperatures. That indicates that the lower the temperature, the weaker the immune response.

Since the nose is usually exposed to cold air more than other parts of the body, this may explain why the rhinovirus infects the nose.

Bottom line: If you're fighting a cold, keep you nose warm.

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