Share with friends and circle of friends with wechat scan QR code < / P > < p > (observer network news) according to the reports of Reuters, CNBC and other foreign media, on June 18, Geneva time, soumya Swaminathan, chief scientist of who, said that due to the first discovery of the new crown < a target = "_ blank" href=" https://news.163.com/news/search?keyword=%E7%97%85%E6%AF%92 "> virus < / a > delta < a target ="_ blank" href=" https://news.163.com/news/search?keyword=%E5%8F%98%E5%BC%82 The propagation ability of > mutant strain has been significantly enhanced. The strain is becoming the main pathogenic variant of COVID-19 worldwide. p> < p > who chief scientist sumia swaminartan < / P > < p > studies showed that the delta mutant's < a target = "_ blank" href=" https://news.163.com/news/search?keyword=%E4%BC%A0%E6%9F%93%E6%80%A7 "> infectious < / a > is about 60% higher than the alpha variant first found in the UK, and the alpha variant is more infectious than the one found in Wuhan at the end of 2019 < p > in addition, who said on June 16 that there are reports that this delta variant can lead to more severe symptoms, but more studies are needed to confirm this conclusion. However, there are still signs that delta mutant may cause a variety of symptoms different from other mutants < p > according to who, the mutant has spread to more than 80 countries around the world, and it is still in continuous mutation at the same time of global spread < p > last month, who declared delta mutant as "a new coronavirus mutant of concern" (VOC). According to who, if a variant is marked "noteworthy," it means it is more infectious, more lethal or more resistant to existing vaccines and treatments < p > according to the data of the Centers for Disease Control and Prevention (CDC), 10% of the new crown cases in the United States are infected with delta mutants, compared with 6% reported last week < p > according to the report of the UK, the number of delta variant infections in the country has increased sharply, accounting for more than 60% of the new cases in the UK In addition, according to senior public health officials in Germany, delta variant strains account for about 6% of the number of new crown infections in the country, and the proportion is still growing. It is expected that delta variant strains will become the main virus strains in the country this autumn In addition, the number of new coronal infections in Moscow, the capital of Russia, has set a record recently, and most of them are delta mutants < p > delta variant was reported in many places of China. The novel coronavirus pneumonia case in Macao was reported on 19 January by 6 was Delta variant virus. Guangxi Nanning City CDC 6 11 days to inform , said, in a Nanning customs inspection and inspection of Indonesia immigration personnel new crowns samples of high flux genome sequencing, confirmed that it infected with COVID-19 Delta mutation. In May 30th, Guangdong Guangzhou Health Protection Committee informed . Since May 21st, the gene sequencing results of infected persons have been highly homologous, and all of them are COVID-19 mutant strains discovered in India. p>