Contrary to the popular belief that going outside with wet hair or without a coat in winter can cause a cold, it’s not the cold weather itself that makes you sick. Instead, cold conditions facilitate the spread of respiratory viruses such as the common cold, influenza, and COVID-19. These viruses tend to thrive in lower temperatures and dry air, becoming more infectious as a result. Research suggests that these conditions make the virus’s outer membrane more rubbery, enhancing person-to-person transmission. Additionally, dry air can cause respiratory droplets to evaporate quickly, resulting in smaller airborne particles that travel further.
Cold weather can also impact your immune system. Inhaled cold air may impair respiratory tract defenses, allowing viruses to thrive. Furthermore, shorter daylight hours in winter reduce sunlight exposure, depleting vitamin D levels, which are vital for immune function. Reduced physical activity due to adverse weather conditions, combined with increased indoor gatherings, heightens the risk of virus spread during colder months.
To mitigate these risks, maintaining good hygiene practices, such as regular handwashing, can help prevent illness irrespective of the season. While cold and wet conditions do not directly cause colds, taking precautions like wearing warm clothing and staying active can contribute to a healthier winter. This information is based on findings by Libby Richards, a professor of nursing at Purdue University, and is republished with permission from The Conversation under a Creative Commons license.
Original Source: https://nenow.in/lifestyle/why-winter-makes-you-more-vulnerable-to-colds-the-science-behind-the-season.html
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Publish Date: 2024-12-25 23:12:00
