"Wrap up warm, or you'll catch a cold!" No doubt you heard that advice a lot as a child, and you may well still hear it as an adult. For a long time, scientists were skeptical about the idea that simply being exposed to the cold could make a person sick. After all, to get sick, you need to actually come into contact with a microbe, like a virus. And cold weather itself isn't a disease.

But recent developments suggest there may actually be some truth to the idea. In December 2022, The Journal of Allergy and Clinical Immunology published a study by a team of American researchers, who had looked into how cold weather affected immunity in the nose. The researchers explained that our nasal mucous membranes, and in particular the extracellular vesicles, act as the first line of defense in our immune system against viral attacks.

What do we know now that we didn’t before? But is the cold the sole culprit? In under 3 minutes, we answer your questions!

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A podcast written and realised by Joseph Chance.

In partnership with upday UK.

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