For a long time, science was formal: you don’t get a cold or the flu when you have a cold. The only thing that matters, we’re told, is whether we’ve been exposed to the pathogen or not, and the resurgence of respiratory infections in winter comes from us spending more time indoors. Science then moderated its observations by showing that respiratory viruses survive better in cold environments, which also tend to irritate the mucous membranes of our noses and therefore make them more sensitive to aggression. When it comes to our immune system, we don’t know if or how the cold actually changes its effectiveness.
At least until the work of researchers from Boston and Cairo universities. They suggest Journal of Allergy and Clinical Immunology a mechanism that could explain this low resistance to viruses in our bodies exposed to the cold. When our nose vibrates, its mucous membrane cells are less able to release…
Source: Le Figaro
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