"Dress warm or you'll catch a cold" said every parent that ever existed. While it's partially true that the body's optimal temperature is a significant player in a well-functioning immune system, that's only part of the equation. The other two reasons we get sick are far more relevant as to why millions are more vulnerable to cold viruses in colder climates.
There are three major mechanisms that allow cold viruses to infiltrate our immune systems in the winter:'
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