Diseases will cause huge threats to human survival and development。Facing the Threat of Diseases，Humans are not passive victims。In the process of long -term evolution，Human beings have gradually developed and improved their own physiological immune system，To fight the pathogens in the invasion。But in front of the disease，Human physiological immune system is not perfect。On the one hand，The function of the physiological immune system will consume a lot of resources，This will inevitably affect the normal operation of other functions of the body。On the other hand，The physiological immune system plays a relatively lagging role，Humans still face the risk of being taken away by the disease。So，During the struggle with the disease，Human evolution has evolved a behavioral immune system。This system is an outpost for the threat of defense disease，The first line of defense for human anti -disease threats。

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　　The behavioral immune system is a collection of a series of psychological mechanisms，Its function is to inhibit the contact with the person or object that may have a threat of the disease。Individual identifies clues that may have disease threats in the environment，Will start the behavioral immune system，When the corresponding psychological mechanism is started，Individuals will make a series of reactions to avoid these people or things in the environment，to prevent or minimize the pathogens into the body。This can be seen，The work of the behavioral immune system is mainly divided into two links: identification and response to the clues of disease threats。

Due to bacteria、Virus、Parasites, etc. are extremely difficult to detect，The object recognized by the behavioral immune system is not these pathogens that are prone to individual infection diseases，It means the clues of these pathogens，For example, a dirty environment、The smell of corruption、The morbid appearance, etc.。but，Because the existence of the pathogen is not the corresponding relationship with the external characteristics of the carrier，plus the variety of pathogens，Therefore, the individual cannot accurately identify the clues of all the presence of the pathogen。So，Individuals follow the principle of smoke detection when identifying the clues of the disease threat，It has the characteristics of excessive sensitivity and excessive generalization。

Whether the corresponding response to whether to perform the corresponding reaction after identifying the threat of the disease is a question that requires weighing the advantages and disadvantages，Because the corresponding response is to pay a certain price。So，Individuals follow the principle of functional elasticity when the individual responds to the threat of the disease，It is characterized by flexible、Elastic，The purpose is to avoid the threat of the disease，Reduce the corresponding price as much as possible。Research indicates，When the behavioral immune system responds to the threat of the disease，It will be subject to individual health、Adjustment of the current environmental reminder of the threat of germs and the degree of pathogenic load in the area where the region is located。

　　Individuals will make a series of response reactions

　　After the behavior of the behavior of the immune system is started by the threat of the disease，Individuals will have a series of reactions，Including emotional disgust、Cognitive prejudice and conservative behavior，To avoid the invasion of the individual's invasion of the disease。

The environment in the environment means the clues of the existence of germs，If the body excrement、Correct food or red -swollen skin often causes individual physiological dislike。The reaction of the disgust is exactly the signal of the individual away from these objects。Prokop and others research discovery，For those who have a low degree of self -reporting health，Software animals such as parasites such as parasites can produce strong dislikes and fear。Due to the behavioral immune system recognition disease threat clue to follow the principle of smoke detection，Those and the body excrement、Similar stimuli such as corrupt food will also induce an individual to have a reaction to disgust。Rozin et al.，Plastic cockroaches and feces of fudes can also make people feel disgusting。

Breeding is a negative cognition，But to a certain extent, it can keep the individual away from those or things that may carry the pathogen of the disease，to reduce the risk of its infection disease。During the evolutionary process，Because the living environment of members in the group is the same，and most of them have blood contact，So the pathogens carried by members in the group，The probability of getting infected with each other in contact with each other is low。and outside group members often bring new albums that members in the group cannot be immune，The intervention of members outside the group may also destroy the social barrier of the threat of the disease formed in the group。So，Individuals will reject members outside the group by prefer members of the group to reduce the risk of infection diseases。When facing the threat of the disease，In addition Bet365 app download to the individual shows that the inside of the group preferences，Sometimes it also shows the derogation in the group。When the pathogen in the group is too high，Frequently interactive group members may accelerate the spread of the disease，At this time, members of the foreign group may be safer for individuals。So，Individuals will show members in the group、The tendency of prefabbing members outside the group。This can be seen，Whether it is an internal group preference or a derogatory inner group，It is a reaction to the behavior of the behavior of the behavior of the behavior of the immune system.。

Facing the threat of the disease，The behavioral immune system usually adopts a conservative behavioral response。Miller et al.，Individuals who are sick recently will make a avoidance of the disfigurers faster，is to drive the joystick。Congzhong can enable people to learn from the social specifications that fight against disease threats。So，During the evolution process，From the crowd of behavior, it has gradually become a reaction to the behavior of the behavior of the behavior of the behavior of the behavior of the disease.。That is to say，Under the threat of the disease，People will be more inclined to from the public。Wu (wu) and others studied found，Compared with the control conditions，Under the condition of germs，The subject will be more inclined to show the crowded behavior，That is。

　　Form social culture that reduce infection diseases

If people in a certain area need to use the behavior immune system to prevent disease threats for a long time，Then this collective response of people in the area will inevitably form a fixed social specification，Then it will gradually form a social culture that is conducive to reducing the infection disease。

Personality differences in different regions are largely related to the load rate of local diseases。bet365 Play online games In areas with high levels of disease threats，Low external direction and openness helps individuals to avoid contact with more strangers，It also helps individuals abide by social norms，These can reduce the risk of individual infection diseases。Schaller and others provided support for this view，That is, the degree of disease threats in different regions has a significant negative relationship with the external direction and openness of people in the region。

People living in areas in the pathogens are more likely to form collectivist values。Because collectivism emphasizes strictly dividing the group and outside the group，and prefer members in the group、Reject members outside the group，At the same time, pay attention to obedience to social norms，These all help reduce the risk of infection disease。FINCHER and others research discovery，The pathogen load rate of a region has a significant positive relationship with multiple indicators of this region collectivism，The region with higher the load rate of the pathogen，The easier it is to form collectivist culture。

　　It has the meaning of reference to the prevention and control of the disease

The behavioral immune system plays an outpost on the threat of defense disease at the individual response and the social and cultural level。We should fully recognize the positive effects and negative effects of the behavioral immune system in disease prevention and control。

From the perspective of individual level，During the high epidemic period of the disease，The pathogen of the pathogen will be very high。At this time, the individual's behavioral immune system will follow the principle of smoke detection，A sensitively identify the clues in the environment as a disease threat，This will help the individual for protection，to reduce the risk of infection diseases。but，With the popularity of bet365 Play online games the disease, it gradually is effectively controlled，If the individual still uses the principle of smoke detection to identify the threat of the disease，It will inevitably cause your own excessive tension and anxiety，Then affect normal life。So，During the low epidemic period，Individuals should give full play to the characteristics of the functional elasticity of the behavioral immune system，Adjust your own protection of the disease at any time according to the actual situation，Try to minimize the effects of prevention and control on diseases on normal life。

From the perspective of social level，Collectivist culture has a social barrier function with the threat of disease。Collectivist culture advocates "everyone is for me，I am everyone "，Emphasize individual obedience to society。So，In a collectivist country or region, it will be more conducive to the outpost of the behavior of the behavior of the behavior of preventing and controlling diseases，However, it should be avoided by individual prejudice caused by the threat of defense disease in the behavioral immune system，and the prejudice of a social group generalized，Such as the disabled group、The group of obese people, etc.。This is not only caused by disease prevention and control，It is not conducive to social harmony and stability。So，We should make the behavioral immune system rationally play a role，Avoid social prejudice due to preventing and controlling diseases。

　　(Author Unit: Department of Psychology, Zhejiang Normal University)