This is a public service announcement to inform you that cold temperatures, may it be arctic air or A/C, do not cause colds. Viruses cause colds.
I’m sure your Mrs thinks the A/C can cause a cold, but it doesn’t.
Thank you and be well.
Cold doesn’t cause colds
Cold weather may be indirectly responsible for colds, however. Vasoconstriction — when blood vessels close to the outside of the body, such as those found in the nose, narrow — leads to dryness. "This dryness compromises the nose's ability to filter infections," Belilovsky explains. "On returning to warm air, rebound vasodilation occurs, where your hands get pink and your nose starts running as blood returns to it." The cycle continues if the runny nose is severe enough to cause mouth breathing. Bypassing the nose's ability to filter inhaled air, combined with dry indoor air, allows the inhalation of virus-bearing mucus, which may trigger colds and lower respiratory infections
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