In fact, normal use is not as harmful as expected! \x0d\ Cell phones transmit information through electromagnetic waves, which is called cell phone radiation. Mobile phone radiation is measured by SAR value. The marathon debate about whether mobile phone radiation is harmful to human body has never stopped. Some people think that the harm of mobile phone radiation to human health is a serious social problem and will not disappear because of the deliberate concealment and avoidance of the mobile phone industry. Some people also put forward the theory that mobile phone radiation is harmless to human health. \x0d\ Related hazards \x0d\ Folding minors' fragile nervous system \x0d\ Cell phone radiation is mainly caused by its high-frequency radio waves. According to the research of American Mobile Phone Association, 60% of the microwave emitted by whip mobile phone antenna is absorbed by human brain at close range. The antenna of mobile phone is the place that produces the strongest radiation, and the distance between the human brain and the transmitting antenna is only 2-5 cm, so it is potentially harmful. \x0d\ At present, the internationally used method for measuring the radiation of mobile phones is "Specific Absorbed Radiation -SAR" defined by the International Mobile Telecommunications Association (CTIA), and its unit is W/kg, which represents the electromagnetic radiation energy absorbed by the human body per kilogram. The United States adopted this standard, and the Federal Council stipulated that it was 1.6W/kg. Previously, China's Ministry of Health and the State Environmental Protection Administration had proposed the standard of 1.0 SAR, but it was not enforced. According to industry sources, the technical work of the new mobile phone radiation standard was completed at the end of last year and is currently being approved by the National Standards Committee. \x0d\ Alvin Wong, a member of the Standing Committee of China Medical Device CT Professional Committee and an expert from the Institute of Medical Imaging of Nanjing General Hospital of Nanjing Military Region, believes that, on the whole, the health effects of mobile phone radiation on minors and adults are similar. Minors are in the process of growth and development, and they are more hurt than adults. \x0d\ Alvin Wong said that the nervous system of minors is most vulnerable to the negative effects of mobile phone radiation. Long-term use of mobile phones may indeed cause memory loss and cognitive decline of minors, and it is also easy to cause irritability and other symptoms. \x0d\ Folding the Myth Truth \x0d\ We live in a cosmic space full of radiation \x0d\ There are more and more radiation sources in space, and the electromagnetic environment is becoming more and more complicated. Even if you think that cell phone radiation is harmful to your health and you don't use it, you can't escape the radiation of radio waves. In a dense radiation environment, the power of your mobile phone can be ignored. Even if you don't use a mobile phone, the radiation will not be much lower than that of a hand user, just like quitting smoking in a smoky smoking room, unless you have the ability to shut down all base stations or live in a deserted place far away from people. \x0d\ The radiation of radio and radar is 10,000 times stronger than that of mobile phones, and the workers are safe and sound \x0d\ Even if they receive stronger non-ionizing low-frequency radio waves for many years, they will not do harm to their bodies. There are many high-power radio stations and radars in the military at home and abroad, whose frequencies cover the frequency band of mobile phones, and their radiation power is thousands of times higher than that of mobile phones. There is a large antenna on the roof, and the workers have worked in this high-intensity radiation environment for many years, and no one has ever seen it. \x0d\ Why can human beings be safe in the face of radiation such as mobile phones? \x0d\ It is generally believed that mobile phone radiation is harmful, and one of the important reasons is gamma rays and X-rays, which are also radiated by radio waves, which are harmful to human health and may cause cancer after long-term contact. However, these two kinds of radiation are essentially different from mobile phone radiation. The former is ionizing radiation, and the radiation energy can be absorbed by human tissues in large quantities, leading to the breaking of chemical bonds. \x0d\ It is safe to use the mobile phone. According to science, the radiation of mobile phones has no obvious harm to people's visibility, but will this radiation affect their health? Through the measurement of mobile APP, it is found that the radiation will increase many times when the distance is too close! Still advise everyone to be cautious! Pay attention to the use of mobile phones, and don't be in close contact for too long to protect your health. \x0d\ folding tumor onset \x0d\ What effect does electromagnetic radiation have on human body is a topic of concern. There are many protective products against this kind of radiation on the market now, the most prominent one is the radiation protection suit for pregnant women. However, there is no clear conclusion about the health risks of electromagnetic radiation such as mobile phones in academic circles: epidemiological investigations have different views on this issue; For the physical effects of electromagnetic radiation such as microwaves, please refer to the article "How much do you know about radiation damage". (2), but in addition to physical effects, medical research also shows that electromagnetic radiation will produce some biological effects, and what impact these effects have on the human body is still unclear. Let's take a look at the research done so far. \x0d\ First of all, the author retrieved an article about epidemiological evidence of mobile phone health risks from the famous medical magazine THE LANCET, entitled "Epidemiological evil en ce on health risks of cellular phones", which was published in 2000 1 1 month (time). This paper summarizes the relevant research so far. Since then, epidemiologists have begun to explore the relationship between the use of mobile phones and the incidence of cancer. Prior to this, the research on the relationship between radio frequency electromagnetic waves and tumor onset came from non-mobile phone contact, such as workers engaged in electromagnetic radiation or amateur radio enthusiasts. Among the seven research results based on the above objects, one study found that the incidence of lymphatic and hematological tumors increased slightly, and the other study showed that the incidence of brain tumors and hematological tumors increased slightly, but the overall tumor mortality did not change; A study found that the incidence and overall mortality of brain tumors "doubled"; A study found that the risk of exposure to non-ionizing electromagnetic fields increased slightly; The remaining studies did not find any signs of an increase in the incidence of other tumors. The article in The Lancet thinks that there are some deviations in these research samples, and almost all of them are retrospective studies, so the conclusions are of limited significance. Subsequently, the article mentioned the large-scale follow-up of nearly 200 thousand employees of Motorola for 20 years, and the results showed that "there was no sign of an increase in tumor mortality" \x0d\ At the same time, this article mentioned a few studies aimed at mobile phone users at that time, all of which concluded that using mobile phones did not increase the risk of cancer. However, it is worth mentioning that, although one of the studies did not find the connection between the use of mobile phones and the incidence of tumors, the incidence of brain tumors is more common in those patients who use mobile phones and do have brain tumors. At the end of the article, the author thinks that the main risk of mobile phone to human health is not electromagnetic radiation. In the same year, a case-control study published in JAMA (Journal of American Medical Association) included 459 brain tumor patients and 422 non-brain tumor subjects from five medical centers in the United States. The results of the study did not find any connection between the use of hand-held mobile phones and the incidence of brain tumors. \x0d\ But a research result released by JAMA has aroused widespread concern. This study is not aimed at long-term mobile phone users, but to observe the relationship between "acute mobile phone exposure" and brain activity. The researchers tested the brains of 47 healthy subjects. The results showed that exposure of mobile phones for 50 minutes affected the glucose metabolism of brain tissue near the antenna of mobile phones, and the glucose metabolism increased significantly. The clinical significance of this discovery is still unclear. Prior to this, fine culture research also found that the non-thermal effect of cell phone radiation led to changes in gene expression and protein activity. \x0d\ In recent years, some epidemiological investigation results have been published or are in progress. In 2009, a study was published on the relationship between the incidence of meningiomas and gliomas and the use of mobile phones among 420,000 people in Denmark, Finland, Norway and Sweden during the period of 65,438+0,974-2003. The report found that in the past 30 years, the incidence of glioma increased by 0.5% for men and 0.2% for women. After the early 1990s, the incidence of meningioma increased by 0.8% in men and 3.8% in women. During the period from 998 to 2003, the incidence trend did not change, and researchers did not find any correlation between them and the use of mobile phones, whether it was the overall incidence or the location of brain tumors [6]. \x0d\20 10 A study of 10 found that using mobile phones did not increase the risk of brain tumors, but the correlation between them could not be completely ruled out. \x0d\ There are also related reports on the study of fetal exposure to electromagnetic radiation during pregnancy: During the period of 1999-200 1, the researchers conducted a case-control study on 1397 tumor children and 5588 normal children, and found no relationship between early childhood tumors and pregnant mothers' exposure to mobile phone base stations. \x0d\ For those who claim to be "sensitive" to mobile phone radiation and feel uncomfortable after exposure, some related scholars have also conducted research. British researchers found through a double-blind random experiment that there is no evidence that those who claim to be sensitive to mobile phone radiation can distinguish different electromagnetic signals and show corresponding physical discomfort. It is speculated that the previous feelings are mostly caused by psychological factors. \x0d\ The above only lists the research results of some mainstream medical journals. Although most clinical studies have not found a clear correlation between tumor occurrence and cell phone use, researchers are still cautious before drawing conclusions. Especially for children, countries adopt different attitudes. In Finland, France, Germany, India, Israel, Switzerland and other countries, the government advises people, especially children, to reduce cell phone radiation. Although other countries and regions have not given official suggestions, they continue to conduct large-scale and convincing research on this issue. \x0d\ According to the epidemiological report that cell phone radiation increases the incidence of Cancer, an article by Cancer puts forward its own views [10]. The article puts forward several questions about these positive report results: First, the subjects knew that they had cancer when they told the researchers about their use of mobile phones, and this information was prone to deviation; Second, many of these positive reports come from the same researcher in Sweden, and the research results of this researcher have not been widely recognized and repeated; Third, mobile phones have been widely used in Sweden for more than 20 years, but the incidence of brain tumors in Sweden has not increased significantly, which makes the research results of the correlation between brain tumors and the use of mobile phones unconvincing. \x0d\ However, there is still room for this chapter on cancer. Regarding whether the radiation of mobile phones is harmful, the article said that it still needs to wait for a long-term large-sample epidemiological investigation. A study called INTER- 1 PHONE initiated by the International Agency for Research on Cancer will cover 13 countries to assess the health risks of mobile phone use to adults; Another study, named MO BIKIDS, will be combined with 16 Center to evaluate the influence of electromagnetic radiation on the incidence of brain tumors in children and adolescents; The United States will also spend $25 million to study the consequences of 3,000 rats and mice exposed to 10 hours every day from birth to old age. We will wait and see the results of these expensive studies. \x0d\ To sum up, strictly speaking, most clinical studies have not found a definite correlation between cell phone radiation and tumor occurrence; Cell phone radiation has certain biological effects, but its significance is still unclear. Opinions on whether mobile phone radiation should be protected are still not unified. What role does the radiation protection suit for pregnant women have in shielding electromagnetic radiation? We appeal to friends with experimental spirit to confirm it. [1] \ x0d \ Folding pregnant women's influence \ x0d \ CCTV once made a program of "maternity clothes against radiation" and introduced the experiment made by researcher Chen. Put an Yagi antenna above the dummy, and put the probe of the field strength meter into the gap between the radiation-proof maternity dress and the dummy for measurement. The conclusion is that the radiation is actually enhanced because the electromagnetic wave oscillates back and forth and the power increases. Although the conclusion of the program about the uselessness of radiation-proof maternity clothes is correct, it is the most harmful to use the wrong argument. \x0d\ Later, CCTV made another program, and invited Academician Liu Shanghe of China Academy of Engineering, who is a top expert in electrostatic protection and electromagnetic radiation in China. He also did experiments on the spot, and concluded that the radiation-proof maternity dress has certain radiation-proof effect, which is a scientific conclusion. However, there is a scientific saying that extends to the biological field, that is, attenuated radiation is meaningless to human health. \x0d "radiation protection maternity dress" is not useless. Wearing it can get more attention, and the chances of being given up on the bus will greatly increase. Europe, America, Japan and other countries have never had this kind of product, but it has become a huge industry in China.