Because people are indoors more often during the winter, they are in close contact more often, and this promotes transmission from person to person. Cold temperatures lead to drier air, which may dehydrate mucus, preventing the body from effectively expelling virus particles. The virus may linger longer on exposed surfaces (doorknobs, countertops , etc.) in colder temperatures. Increased travel and visitation due to the holiday season. Less sunlight promotes virus survival. Our immune systems work poorly during the cold weather. ( From Wikipedia ).



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Progressive ordering with decreasing temperature of the phospholipids of influenza virus

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Nature Chemical Biology

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