New research suggests there may be biological reasons that we are at a significantly increased risk of getting sick when temperatures drop.
Why is everyone sick right now? Cold, flu, and Covid season is
Can the cold really make you sick?
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Breakthrough study on why people get more colds in winter
If cold weather isn't actually the reason of getting pneumonia, common colds, and flu, then why do people catch one of them exactly in the cold weather season? - Quora
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Common cold: Stage by stage
Scientists finally know why people get more colds and flu in
Scientists finally work out why you're more likely to get a cold
The secrets of people who never get sick