The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
the heated air tends to be drier air. Now, this is a little bit counterintuitive because if you ever go outside on a really cold winter day, you will realize that the cold weather outdoors is extremely dry. [...] Whereas indoors we're heating that air and indeed the heating of that air does have the property of drying the nasal and oral passages but especially the nasal passages.
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Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
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Dry air destroys the mucus lining of our airways so viruses can gain access.
Gordon Lauc hypothesized that low humidity in winter makes your lungs less able to prevent infection.