Traditionally, colds are thought to be caused by climate change, cold, overexertion, or influenza virus infection through the whistle. In recent years, Dr. Greenway of the University of California has discovered five new ways to catch a cold through clinical observation. 1, “touch” out of the cold Medical research shows that the touch of the hand is most likely to spread the cold. British researchers let 20 healthy test subjects to the cold patient room for 3 days, as they maintain normal activities, nutrition and cleanliness, are not infected with the cold, because the cold patient spray out droplets, only 8% is with the influenza virus. Influenza virus is commonly found in the nasal snot of cold patients, and the temperature and humidity of the nasal cavity are most suitable for the reproduction of influenza virus, and it is all spread outward from here. Influenza virus can survive on a handkerchief for 1 hour and on the hand for 70 hours. When a person with influenza blows his nose or pulls out his nostrils, the virus sticks to his hands and is then transferred to the places he touches through his hands. For example, handkerchiefs, towels, doorknobs, telephones, tables and chairs, etc. Healthy people who touch these hands or objects contaminated with influenza virus, and then touch their eyes and noses, will catch the flu. Therefore, the most effective way to prevent a cold is not to shake hands with a cold patient or shake hands immediately, wash hands regularly, wash handkerchiefs regularly, etc. 2, “sitting” out of the cold Dr. Greenway by a large number of clinical observations found that people with little activity, the chance of catching a cold is 2 to 3 times higher than people with normal activity. After the only TV tower in a small island in the Philippines fell down due to a typhoon, the visit rate of children’s colds in the hospitals on the island dropped dramatically. After the investigation, the children were gathered in front of the TV all day long, but now they are jumping back to nature and recovering their resistance to the cold virus through normal activities. 3, “sad” out of the cold Medical research found that emotions and immune function is a pair of “twin brothers”. People who are often worried are likely to cause a decline in immune function, the body’s ability to kill and engulf pathogenic microorganisms and inflammatory cells will be weakened, interferon levels will also be reduced, resulting in a temporary reduction in the defense function of the whistle tract, giving the pervasive whistle tract virus to “take advantage of”. According to Dr. Greenway’s statistics, people who are often worried, the disease toxicity of the upper whistle infection is 3 to 5 times more than normal people. The British cold research group of scholars, for healthy voluntary subjects to do the psychological aspects of the test, the subject’s psychological stress into levels, and then let them infect the cold virus. As a result, the group of psychologically stressed and introverted group had more severe cold symptoms than the group of psychologically stressed and extroverted group. Experts believe that open-mindedness, emotional optimism is an effective way to prevent colds. 4, “eat” out of the cold German Dussel Nutrition Institute Professor Gustav Kranhoffer research shows that the cold and diet are closely related, some colds are caused by improper diet. Such as excessive consumption of meat, dairy products, etc., can reduce the body’s immune cells antiviral ability, causing colds; excessive intake of high-salt food, can lead to reduced saliva secretion, so that the oral and nasal mucosa edema, congestion, increased pathogenic microorganisms, easy to cause the upper whistle infection, and eventually lead to colds; consume too much high-sugar food, can consume water and nutrients in the body, causing dry mouth and dry tongue, so that the body Immunity is reduced, which in turn can easily induce colds. 5, drug-induced “cold” In recent years, clinical observation found that there are many drugs, people use, there will be chills, fever, headache, nasal congestion, runny nose, aching limbs and other cold-like symptoms. If you do not promptly identify the true nature of these “colds” and take anti-cold drugs, it will be futile. Now the drugs that can commonly cause cold symptoms are: (1) antibiotics: such as rifampin, streptomycin, penicillin, cephalosporins, erythromycin, isoniazid, interferon, levamisole, etc. (2) Vaccines: such as rabies vaccine, measles vaccine, measles-mumps-rubella triple vaccine and diphtheria triple vaccine, as well as leptospirosis vaccine and typhoid vaccine, etc. (3) Cardiovascular drugs: such as sodium biphosphate alginate, amiodarone, ciliprolol, hydrazidazine, procainamide, heparin, abdominal snake antithrombin, etc. (4) Tricyclic antidepressants: such as promethazine, amitriptyline, doxorubicin, fluoxetine, etc. (5) Anticancer drugs: such as cisplatin, cisplatin, etc. (6) Anti-tuberculosis drugs. (7) Others: anti-gastric acid secretion drugs such as cimetidine and ramitidine and low-molecular dextrose, Chinese herbal medicines such as neem bark, etc. can also cause cold symptoms. It is likely that taking these drugs can cause cold symptoms and cause abnormal immune response, or some drugs have different degrees of suppression of the body’s immune system, and regular use of such drugs can reduce the body’s ability to resist disease, thus predisposing to cold and other diseases. Therefore, the rational use of medication is also one of the measures to avoid the occurrence of colds.