On Tuesday local time, the who issued a solemn warning on the spread rate of the Omicron variant virus at a regular press conference, and said that it was also dangerous for many arguments to regard the mutant virus as a position of reducing harm. Tan Desai, director general of the organization, said at a news conference that the transmission rate of Omicron was unprecedented in the previous mutant virus. At present, 77 countries have reported the detection of the mutant virus. In fact, Omicron virus has appeared in most countries, but it has not been found in some countries. Tan Desai also raised concerns about the argument that "the toxicity of Omicron mutant is reduced" and stressed that this idea is very dangerous. Who has now clearly understood that the world has underestimated the Omicron virus. Even if the symptoms caused by the virus are lighter than those of the previous strain, the sharp increase in the number of cases itself may overwhelm the unprepared health system. Taking South Africa, which first reported the Omicron strain, as an example, the number of newly confirmed cases in that country doubled in just one month, and reached a new high of one-day confirmed cases since the beginning of the epidemic last weekend. (source: worldmeters) In the United States, where vaccination rates are higher, the Omicron virus is also emerging. According to the data released by the U.S. CDC on Tuesday, according to the sequencing samples, it is expected that 2.9% of the cases reported in the United States last week were Omicron infection, significantly higher than 0.4% in the previous week. Due to a large number of variations of Omicron virus in the spike protein region of the mainstream vaccine, a number of preliminary research data show that the protective efficacy of most vaccines has been greatly attenuated. Discovery health, South Africa's largest medical insurance provider, said on Tuesday that the effective rate of protection against Omicron virus among people who have completed two doses of Pfizer / BNT vaccine has been reduced to 33%, but from the perspective of avoiding hospitalization and severe illness, the effective rate still reaches 70%. Tan Desai also said at the press conference on Tuesday that "vaccines alone can not cope with the epidemic". We also need to wear masks, maintain social distance and indoor ventilation, and adhere to strict hygiene habits. These things should be done, and we should find ways to do our best. (New)