Recently, Henan and other places continued to suffer heavy rainfall, serious waterlogging occurred in Zhengzhou and other cities, some rivers exceeded the alarm water level, individual reservoirs broke dams, some railways were shut down and flights were cancelled, resulting in heavy casualties and property losses. The flood control situation is very serious.

Xi Jinping demanded that all relevant departments in the region should resume production and living order as soon as possible while doing well in flood control and disaster relief work, and do solid work to help disaster victims and prevent sanitation and epidemic prevention, prevent the return of poverty due to natural disasters and "serious epidemics after major disasters".

01. Why is there a phenomenon of "major epidemic after major disasters" in history?

"Food hygiene in flood stricken areas": "as the saying goes:" after a major disaster, there must be a major epidemic. "It means that in the past, after major natural disasters, bacteria and viruses would breed in large numbers due to the destruction of the normal living environment. When sanitary conditions are insufficient and treatment is not timely, a large-scale epidemic will occur.

While destroying public facilities and housing, the flood caused by rainstorm will inundate farmland, depression and village toilets, septic tanks and garbage dumps. In addition, a large number of plant and animal corpses are corrupt, forming a natural paradise for bacteria and viruses, which poses a serious threat to people's life safety.

As of the 22nd, provinces across the country have rushed to Zhengzhou and other places to assist in flood control and disaster relief, showing our strong unity.

With the decrease of rainfall, the floods in Zhengzhou are gradually fading away, but the heavy rainstorm has not ended. Hebei and Shanghai have successively issued rainstorm warnings. Local governments have stressed the need to strengthen disinfection and epidemic prevention while actively draining the floods.

02. Nature always treats people equally. Water is not only the source of human life, but also a breeding ground for germs

Cholera, hepatitis A, typhoid, dysentery, infectious diarrhea, enteritis and so on are the most frequent outbreak of enteric infectious diseases after floods, followed by foodborne diseases caused by destruction and pollution of water sources and water supply facilities. Respiratory transmission diseases, plague and vector borne infections will also be relatively high.

Comparison of killing ability of ultraviolet to various bacteria

03. After the flood, we can take more measures to prevent the "epidemic"

Remove all kinds of garbage, feces, rotten food and moldy items as soon as possible, bury animal corpses and eliminate mosquito breeding places. At the same time, disinfect the surfaces of ground, walls, doors and windows, desktop and other objects to remove hidden dangers. Strengthen residents' awareness of drinking water disinfection, strengthen water source protection, water quality monitoring and disinfection. Pay attention to food hygiene and do not eat contaminated food, Clean the kitchen and keep the dishes fresh. Fully disinfect the articles for daily use, especially the articles soaked in flood or polluted by disease source. Use high temperature, ultraviolet light and other methods to fully kill them before use. The articles with serious pollution need to be treated innocuously.

04. Deep UV can be used for disinfection of municipal sewage, reclaimed water reuse, tap water deep purification, aquaculture water, food processing water and medical water

As a kind of physical disinfection, ultraviolet disinfection technology has broad-spectrum sterilization ability and no secondary pollution.

In 1970, EPA completed the first demonstration project of ultraviolet disinfection of sewage. After half a century of development, it has been widely used in the United States and Canada and has become a mature, reliable, efficient and environmentally friendly disinfection technology.

It has been widely used in municipal sewage, reclaimed water reuse, tap water deep purification, aquaculture water, food processing water, medical water disinfection and other fields.

With the formal implementation of Minamata Convention and the rapid maturity of high-power UVC LED products catalyzed by the epidemic, UV sterilization technology will become the mainstream technology of water sterilization and disinfection, and make more contributions to China's public health and people's healthy life.

stand together through storm and stress! We can do it