In our life, we often hear such words as [caught a cold in sleep last night]. In the English world, the common cold translates into [common cold].
No matter in the East or the West, people deeply believe that if they catch a cold, they will catch a cold.
着凉感冒傻傻分不清
Caught cold is also called cold, that is, the body feels cold.
The coolness here can be seen as caused by large temperature difference changes in the outside world. For example, when falling asleep at night in summer, the temperature difference can reach 10 degrees compared with that in the daytime. However, if you do not pay attention to keeping warm, you will easily catch cold.
On cold winter days, if you don’t wear enough clothes to keep warm during outdoor activities, you will also catch cold due to too low a temperature. The consequences of catching cold may be many, such as shivering, sneezing, nasal obstruction, diarrhea, etc.
These conditions are indeed similar to colds. Cold is one of the most common infectious diseases and the most common respiratory disease.
你为什么会感冒?
It is said to be an infectious disease because colds are actually caused by the invasion of viruses, and the viruses can continue to spread everywhere, such as sneezing or droplets when talking, shaking hands with others, etc.
When your body is overtired and your resistance decreases, these viruses will stir and harass you. There are hundreds of them with numerous names, such as rhinovirus, adenovirus, rotavirus, etc.
However, 50% of the common cold is caused by rhinovirus, and 90% of patients can isolate the virus from their hands. Fortunately, the virus is relatively docile, so there is no need to worry too much.
As can be seen from the above, catching a cold is not a cold, and the two cannot be equivalent.
那着凉会引起感冒吗?
Let’s see what scientific experiments say.
In 1958, H.F. Dowling of the University of Illinois School of Medicine in the United States tried to find out if there was a link between catching a cold and catching a cold. More than 400 medical students were recruited to do an experiment. First, all the students were exposed to the virus that can cause colds, and then some of them were given a cold. Some volunteers wore heavy cotton-padded clothes in extremely low temperatures, others wore underwear in comfortable temperatures, and others let them feel the heat.
Interestingly, everyone has the same chance of catching a cold. In other words, the key to catching a cold is not whether you catch a cold, but because you are exposed to these viruses, which makes you catch a cold.
In 1968, an American doctor, R.G. Douglas, conducted a similar experiment on prisoners in Texas. He first put the virus into the nose of the prisoners, then exposed them to the cold and wore different amounts of clothing to keep warm.
In order to further verify whether catching cold will cause colds, some hair is wet. However, no matter what how does, their chances of catching colds are still the same.
From this point of view, the main culprit causing the cold is the virus. A cold that makes your nose stuffy and sneezing is not a pride in catching a cold.
另有蹊跷
But catching a cold can cause symptoms similar to colds. Why?
When the temperature difference between day and night is large, the receptors on the skin surface will feel the coolness and then report it to the brain center headquarters urgently. The headquarters will issue instructions to sneeze, and at the same time the skin pores will shrink, goose bumps will appear, and perhaps you will shiver involuntarily to fight against the coolness.
In addition, colds are more common in cold winter, which also makes people think that catching cold and catching cold are related to colds. In fact, there is something else strange.
Generally speaking, when the air humidity reaches more than 50%, the cold virus can die rapidly, but the dryness in winter just provides a comfortable environment for the virus, which greatly prolongs the survival time of the virus in vitro.
In addition, when going out in winter is reduced, people are huddled in warm rooms. Closed environment and non-circulating air make it easier for the virus spread by cold patients to survive in the air for a long time and infect others.