Remember what the commercial vehicle parked on the Philippine street said in March and April? Stay at home or lie in a coffin . There is also Russia's hard-core action of putting 500 tigers on the street to force people to be isolated at home. The other is to strictly check the entry and exit personnel, after all, the infection rate of entry is also very high. It is said that North Korea has completely blocked the border, and if illegal immigrants are found, they will be isolated on the spot. Those who seriously violate the isolation regulations in North Korea can immediately enforce the law on the spot. This is still very difficult. Thanks to these tough measures, the epidemic has been largely controlled. After all, the way of epidemic spread is people-to-people contact, which is easier to deal with after cutting off contact.

However, although there are differences between countries in releasing tiger coffins, many aspects are the same. For example, wear a mask, wash your hands frequently, and don't have parties. Especially in developed areas, due to the high degree of automation in public places, this has also reduced the infection rate to some extent.

The other is that the guarantor can cooperate with the isolation. Like western countries, COVID-19 was initially ignored, and the biggest problem was that leaders and the public ignored the epidemic. In addition, COVID-19 is very susceptible to infection. There are too many people infected in the initial stage, which makes it more and more difficult to control in the later stage. Once the medical system is paralyzed, it is difficult to control the number of infected people.

In addition, Iceland adopts the method of spot check by the whole people. After all, the total population of Iceland is not large.

Needless to say, the United States is catching up with frequent conflicts and it is very difficult to isolate everyone in the country. As well as people's own indifference to COVID-19, they don't pay attention to protection and even try to infect themselves with the virus. Therefore, if they don't cooperate with epidemic prevention, it is not surprising that there are many infected people. There are too many people, and medical supplies, wards and medical staff are far from meeting the excessive demand, not to mention the huge psychological pressure. Therefore, it is difficult to effectively control the infected population.