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Date: Sat, 10 Dec 2022 07:23:13 -0800 (PST)
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Subject: Scientists finally know why people get more colds and flu in winter
From: Fred Bloggs <bloggs.fredbloggs.fred@gmail.com>
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It's the cold air, stupid. Cold air inhibits an otherwise very effective frontline innate immune response in the nasal passages that otherwise would have stopped invasive pathogens in their tracks. Wear a mask if you're infirm.

https://www.cnn.com/2022/12/06/health/why-winter-colds-flu-wellness/index.html