Upper respiratory infections, which are very common in everyday life, can lead to a number of symptoms of discomfort, such as cough, snot and throat pain. Understanding its causes is important for us to prevent and respond to such diseases.
The virus is one of the leading causes of upper respiratory infections. Common viruses include nasal viruses, coronal viruses, flu viruses, sub-influenza viruses, gland viruses, etc. Nasal viruses are the most common pathogens that cause common influenza and can cause infection in four quarters of the year, especially in spring and autumn. For example, Lee came back from a spring trip and in a few days there were signs of sneezing, snorting, and mild coughing. Upon going to the hospital, an upper respiratory infection from the nose virus was found. This is because, during his tour, he may have been exposed to persons or objects carrying a nasal virus, which enters his upper respiratory tract through his nasal cavity or mouth, thereby causing infection. Influenza viruses, on the other hand, often cause influenza epidemics in winter and are more contagious. Once infected with the influenza virus, the symptoms tend to be more severe than the common cold, with the risk of high heat, headaches, muscular acidity and inactivity. For example, in his office, one of his colleagues had influenza last winter, and a few colleagues, including Zhang, had been infected with the influenza virus for various degrees of upper respiratory infections, owing to the long time you spent in the office and the insufficient protection.
b. Bacteria infections, although relatively few than viruses cause upper respiratory infections, are also factors that cannot be ignored. The common pathogenic bacteria are soluble streptococcus, pneumonia streptococcus, grapes. When our upper respiratory tract is infected with the virus, there is a degree of damage to the defensive function of the respiratory mucous film, which creates conditions for bacteria to invade. For example, Wang had a common cold, and at first it was just a snot, a cough, and he thought it would be better in a few days. After a few days, however, the symptoms were not abated, but rather aggravated, and there were cases of high heat, coughing and yellow slime. After visiting the hospital, it was found that the infection was based on the virus and was followed by bacterial infection, this time by the presence of the soluble streptococcus, which caused more severe upper respiratory infections.
Environmental factors. Environmental factors also play an important role in the occurrence of upper respiratory infections. Cold weather will shrink our respiratory mucous veins, reduce their local defensive capacity and make pathogens more vulnerable to intrusion. As in the late winter, many people suffer frequent upper respiratory infections. Zhao is one of them, and every winter, he comes back with a slight lack of heat and a cold wind, which is the result of cold weather effects on the respiratory mucus. In addition, air pollution is an important factor. Long periods of haze weather, high dust levels, or inhalation of irritating substances such as second-hand smoke and chemical fumes stimulate respiratory mucous membranes and make them more vulnerable to pathogen attacks. For example, Li works in a factory, where dust is often found and, although he wears masks, some dust is sometimes inhaled. For a long period of time, he suffered from upper respiratory infections much more frequently than ordinary people.
IV. Weak self-immunization, which is an important line of defence against the invasion of pathogens, makes us more vulnerable to upper respiratory infections when we have low immunity. For example, older persons, children, pregnant women and people with chronic diseases (such as diabetes, chronic obstructive pulmonary diseases, etc.) have relatively weak immune systems. Like Grandma Zhang, he’s old, his body’s all down, his immunity is low. She is always the first to suffer from upper respiratory infections at the turn of the season, often with serious symptoms and much slower recovery than young people. In addition, poor living habits, such as long-term stayovers, overwork, lack of exercise, malnutrition, etc., can lead to reduced immunity and thus increased the incidence of upper respiratory infections. Zhao is a workaholic who often works late at night, has little exercise and has irregular diets. As a result, he had significantly more upper respiratory infections than his peers.
In general, the causes of upper respiratory infections are multiple, including viruses and bacterial infections, environmental factors and low self-immunisation. Understanding these causes allows us to take targeted preventive measures, such as increased exercise, increased immunity, environmental cleanness and personal protection, so as to reduce the risk of upper respiratory infections.
