What causes a cold, what causes it?

0 colds are not terrible, meow meow to support.

You can drink some soybean mint lean meat water. After boiling with water, this water clearing pyrolysis table is often used for wind-heat colds and headaches.

Caused by a virus.

Take cold medicine.

In fact, if it is not serious, it is better not to take medicine.

Some doctors don't take medicine if they have a small problem, because the medicine is poisonous.

Colds are basically caused by viruses.

Colds are caused by viruses.

Colds are caused by a viral infection. Have a common cold; Popular** risk; The newly discovered influenza A is one of the most popular epidemics. What causes a cold?

Viruses account for about 70% to 80% of acute upper respiratory tract infections. The main influenza viruses (A, B, C), parainfluenza virus, respiratory syncytial virus, adenovirus, rhinovirus, echovirus, coxsackievirus, 、..

I think colds are respiratory diseases, and about 70%-80% of acute upper respiratory tract infections are caused by viruses. The main influenza viruses (A, B, C), parainfluenza virus, respiratory syncytial virus, adenovirus, rhinovirus, echovirus, coxsackievirus, measles virus, rubella virus. Bacterial infections can occur directly or after viral infections, with hemolytic streptococcus being the most common, followed by Haemophilus influenzae, pneumococcus and staphylococci.

Gram-negative bacilli are occasionally seen. The main manifestations of infection are rhinitis, pharyngitis or tonsillitis.

When there are predisposing factors such as cold, rain, excessive fatigue, etc., which reduce the local defense function of the whole body or respiratory tract, the viruses or bacteria that already exist in the upper respiratory tract or invade from the outside world can multiply rapidly, causing the onset of disease, especially for the elderly and young who are weak or have chronic respiratory diseases such as paranasal sinusitis and tonsillitis, which are more likely to catch a cold.

Nasal and pharyngeal mucosa congestion, edema, destruction of epithelial cells, infiltration of a small number of monocytes, serous and mucinous inflammatory exudations. A secondary bacterial infection can lead to a cold.

Colds are one of the most common illnesses in humans and are caused by cold virus infections. After the cold virus invades the body, the body can produce antibodies to fight the cold virus. But why do people still get colds repeatedly?

1) Cold virus antibodies cannot be retained in the human body for a long time. Common cold virus antibodies generally only last for about 1 month, and epidemic virus antibodies can be maintained for 8 to 12 months, so immunity after a cold can generally be maintained for 1 month, and epidemic viruses can be maintained for 8 12 months. (2) The immune effect of antibodies is specific.

Although the human body can produce antibodies and obtain immunity after a cold, this immunity is specific and only has an immune effect on the pathogens that cause the human body to produce this immunity, and has no immune effect on other pathogens, so it is also called specific immunity. (3) There are many types of viruses that can cause colds. According to research, more than 90% of colds are caused by viruses, and more than 200 types of viruses have been found to cause colds

Influenza virus, parainfluenza virus, rhinovirus, syncytial virus, coronavirus, adenovirus, and enterovirus, among others. Soon after being infected with one virus, it is possible for the human body to be infected by another virus, so a person may suffer from repeated colds in a short period of time. Autumn and winter alternate, the temperature rises and falls, and it is the season of frequent colds.

At this time, some people often catch a cold with the change of climate, and the previous cold has not healed, and the next cold starts again, itching and sore throat all day long, the whole body is tight, hot and cold, and the mind is not clear. Generally speaking, people with sufficient health motivation are not easy to catch colds, even if they have a cold, they are also relatively mild, and they are faster. People with insufficient health motivation and low immunity are susceptible to colds; After a cold, the symptoms are worse than others, and the fever does not go away; Frequent colds are easy to cause complications such as pneumonia, myocarditis, and acute nephritis.

Therefore, at the turn of autumn and winter, people who are prone to colds should pay more attention to preventing colds. There are many ways to prevent colds, but the key to preventing and treating colds is to improve the driving force of health, enhance the local immune function of the whole body, respiratory tract, trachea and bronchi, and resist various viruses or bacteria that invade from the respiratory tract.