What is occupational hazard?

There are various occupational hazards in poor working conditions, which can be divided into three categories according to their sources:
I. Harmful factors caused by contact during research production
1. Chemical factors: Toxic substances such as lead, mercury, chlorine, carbon monoxide, organophosphorus pesticides, etc.; productive dust such as whisk, asbestos dust, coal dust, organic dust, etc.
2. Physical factors: abnormal weather conditions, such as high temperature, high humidity, high pressure, low pressure, etc.; noise, vibration; radio frequency, microwave, infrared, ultraviolet; X-ray, y-ray and so on.
3. Biological factors: such as anthrax, brucella, forest encephalitis virus attached to the skin.
Second, the harmful factors in the research labor process
1. Labor organizations and labor systems are irrational, such as long working hours, unreasonable rest systems, and incompleteness.
2. Excessive mental stress in labor.
3. Excessive labor intensity or improper labor arrangements, such as the arrangement of the work and the physical conditions of the workers are not suited, the production is too high, overload and overtime.
4. Excessive stress in individual organs, such as visual strain caused by insufficient light.
5. For a long time in some bad position or use unreasonable tools.
Third, harmful factors in the research and production environment
1. Scientific research and production do not meet hygienic standards or requirements, such as low and narrow plant buildings, unreasonable layout, toxic and non-toxic sections are arranged together.
2. The lack of necessary sanitary facilities, such as ventilation, lighting, dust, poison, anti-noise and anti-vibration equipment, or poor results.
3. Safety equipment and personal protective equipment are not fully equipped.
In the actual scientific research and production sites, the hazard factors are often not single, but a variety of factors at the same time have an effect on the health of the workers. At this time, the harm is even greater.
Occupational injuries caused by occupational hazards also include work-related injuries. Work-related injuries may be minor to severe, and may even lead to disability or death. Therefore, adequate attention must be paid to prevent injuries. There are many causes of work-related injuries. Workers lack knowledge of safe production, carelessness of protection, psychological problems, or factors such as drinking, drugs, fatigue, and mental health. Work injury and occupational disease prevention can not be completely separated, the two often have intrinsic links.