冬天快来了 别人都让我们多穿衣服 不然就会感冒
Winter is coming – and we’ve all been told to put on a jacket outside, or you’ll catch
当然 现在最常见的回答是’别傻了 冻着并不会
a cold! Of course, the common response of today has become ‘Don’t be silly, being cold
感冒’或者 ‘寒冷真的会引起感冒吗’ 哪种说法才对呢
can’t give you a cold’. Or can it? Who wins in this battle of the beliefs?
The correlation between cold weather and sickness does stand out. Between 5-20% of Americans
会在秋冬季节感冒或流感 更不用说 天气
catch a cold or flu every year around late fall and winter. Not to mention, it’s called
是寒冷的 但也有些重要的东西是要考虑的 第一
a cold. But there are some important things to consider. First and foremost: colds and
感冒和流感是由病毒引起的 如果你身边没有这些病毒 你是不会感冒的
the flu are caused by viruses. if there aren’t any around, you won’t catch a cold – no matter
how cold you get. It’s as simple as that.
那为什么感冒会与温度下降相关呢 一个原因是 人们在寒冷的天气里
So why the correlation with decreasing temperatures? Well for one, people tend to stay indoors
much more often during the winter, which in turn, puts them in contact with more people.
More people, means more exposure opportunities for the pathogens to spread. On top of this,
humidity plays a role in the spread of some viruses. As the humidity decreases in the
winter, not only does the virus spread more readily, but the mucus in your nose dries
out. Mucus would otherwise act as a protective barrier to pathogens. Finnaly,
the lack of Vitamin D which we get from the sun, can affect our immune system adversely.
Both being inside more often, and the fact that winter has shorter days makes this a
big factor for your health.
So you’ve proven your parents wrong… right? Not so fast!
While some past studies have shown no correlation to temperature, recent evidence suggest otherwise.
One study which put test subjects feet into ice water found that they were, indeed, more
likely to develop common cold symptoms in the following days, than those who didn’t.
The developing hypothesis behind these results is that the cold temperatures cause blood vessel
constriction, which slows the white blood cells from reaching the virus, ultimately
inhibiting the immune response. Cortisol levels, which pressures the immune system, are also
这也可以由温度引起 更进一步来说 在白老鼠和人体上的研究发现
increased with temperature induced stress. Furthermore, studies on both mice and human
airway cells found that immune reaction to the common cold virus, in fact, temperature
dependent. Warm infected cells are more likely to undergo programmed cell death, to limit
the spread of infection.
最后 对病毒自身的研究发现了病毒一种秘密武器 在冬天的温度里
Finally, studies of the virus itself have revealed a secret weapon of sorts. In winter temperature,
the virus’s outer layer or envelope becomes much harder and acts like a shield.
This allows it to spread from person to person much more easily. But at warm temperatures,
this layer is more of a gel, which is not quite tough enough to protect the virus against
the elements. As a result, its spreading ability is compromised.
所以说 你父母的话并不全部是错的 一个更好的办法是 多带在室外
So, maybe your parents weren’t so wrong after all. A happy compromise of going outside
more often, bundled up, is likely to get you through the winter unscathed.
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冬天快来了 别人都让我们多穿衣服 不然就会感冒