Urban policies in Coronavirus crisis management

Coronaviruses were discovered in the ۱۹۶۰s, and continued to be studied until the mid-۱۹۸۰s. The virus is naturally prevalent in mammals and birds, yet seven human-transmitted coronaviruses have been discovered so far; the most important of these, SARS Acute Respiratory Syndrome or acute respiratory syndrome, was a dangerous viral respiratory disease of genetic origin caused by coronavirus and from November ۲۰۰۲ to July ۲۰۰۳, the outbreak in Southern China caused ۸۰۹۸ cases. Possible disease and death of ۷۷۴ people in ۱۷ countries, and now since December ۲۰۱۹, another and more dangerous type called COVID-۱۹ has spread with the human epidemic in Wuhan, China and in a short time has spread all over the world. China was the source of the virus, as well as the first country to stop it's spread to a large extent, but other countries failed to contain the virus despite their ability to contain it. Why? The answer is simple: "It is a matter of policy and approach, not power"! Another issue is "change"; as cities begin to recede and move toward recovery, the consequences of the epidemic will lead to new norms. In this article, we have tried to study the process of crisis management in several countries of the world is facing this virus and the extent of damages to the citizens of these countries until April ۳۰, ۲۰۲۱.