Why do you catch a cold when it's cold? As long as the weather is not cold.

Indeed, cold weather is easy to catch a cold, while warm and continuous weather is not easy to catch a cold. This is because: the mechanism of people's cold is that their own immune system is very fragile under certain circumstances, and viruses and bacteria take advantage of it to get infected. Generally speaking, the immunity is strong when it is hot at constant temperature and weak when it is cold, especially in the process from constant temperature to rapid cooling, people's immunity is relatively weak. That is to say, when the weather is unchanged, people's immunity will be poor if they wear the same clothes and suddenly get cold, or suddenly go from a hot place to a cold place. Therefore, in the cold winter, people are easy to catch a cold. As for the cold in summer, there are other reasons under this theory, but there are definitely fewer people catching a cold than in winter. Not much to say here.

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