According to the World Health Organization report: the control of the epidemic in the United States, Iran, Brazil, India and other COVID-20 is still unstable, the number of daily infections and deaths is still increasing, and citizens' awareness of personal protection has reached the standard. So, what is still spreading the virus as a medium?
 

We all know that the new coronavirus is mainly transmitted through the air and saliva for respiratory tract. When people protect their heads well, why the epidemic is still not controlled. In fact, we ignore the survival characteristics of the virus itself: small size, easy to attach; strong reproductive capacity, and large survival space. The virus itself can be attached to our clothes, shoes, hair, etc. As long as the production conditions are suitable, we can survive and wait for the host. In areas where cities have sufficient water supply capacity, people can ensure personal safety as long as they guarantee personal hygiene. If your area is short of water, please try not to go out as much as possible to increase the risk of infection.
 

If we think of the city as a piece of "clothing" that may have viruses attached to it, then the best way to cut off the infection between them is to clean and disinfect it. The huge water and disinfectant will be the biggest difficulty and obstacle for people to carry out this great project. Some people may ask: "Earth is called Mercury, and there is still a lack of water?" Yes, it is difficult to transport water in Africa or in the arid regions of the whole year, even if the assistance of countries around the world is not a simple matter. However, this is something that must be done together through the world.
 

Imagine if a pandemic broke out in an arid area, the lack of water resources would be a devastating disaster. You can refer to the COVID-19 global data table, whether there is a lack of water resources in areas where the epidemic cannot be completely controlled, which has nothing to do with poverty and wealth.
 

Only by completely removing the virus from the "clothing" one by one, can it be possible to cut off the infection of the virus, which is still when the climate is relatively warm. As the climate gets colder, the difficulty and crisis of virus propagation and transmission will escalate again.

This article is a personal opinion.