Obviously, diseases like the cold and flu are cause by viruses, so weather alone wouldn’t cause it. So why do we get runny nose, sneezing, and other symptoms when we go out in the cold without a jacket?
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> Obviously, diseases like the cold and flu are cause by viruses, so weather alone wouldn’t cause it. So why do we get runny nose, sneezing, and other symptoms when we go out in the cold without a jacket?
Ok, I think there are 2 different things here:
1. Many viruses survive better in cold, dry air. So they spread better in winter .
2. Cold air irritated the sensitive membranes in your nose, causing your nose to run even if you’re not sick.
3. Cold reduces the blood flow to those same membranes, lowering immune response.
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