"This took place in Mexico's people are suffering from outbreaks of swine influenza virus is a typical cross-species transmission sector. From the results of genome sequencing, the influenza vaccination this year, vaccine to its role in prevention." April 26, Microbiology, Chinese Academy of Sciences study by the researchers, "973" issue "of animal origin STD drug cross-species transmission sector the molecular mechanism of "high-fu, chief scientist of" Science Times "said.

, according to Xinhua News Agency, April 24 the World Health Organization confirmed that since last month, Mexico, more than 880 pigs were found in patients with suspected influenza, of which 62 people were killed. Occurrence of the virus is a new type of gene mutation in the virus, the most worrying is that it has spread among people.

Margaret Chan, WHO Director-General recently said that this has been in the interpersonal transmission of swine influenza virus, it is obvious that the existence of evolved into a pandemic virus might be, and the development of the situation "unpredictable." Margaret Chan said that in the interpersonal transmission of new viruses so that mankind is facing a "severe situation."

"The swine flu epidemic is very serious, because the pig and human genetic studies in the characteristics of similar, but also shows that both the immune-derived and antigen are similar. This means that If influenza virus in pigs adapt quickly, then in the human body will adapt quickly. it than the H5N1 type of avian flu is even more serious. "Microbiology, Chinese Academy of Sciences researcher, said Liu Wenjun.

CDC confirmed that the United States, Mexico is a swine influenza virus type A/H1N1, the strain is a new variation of the virus of human influenza virus, avian influenza virus in North America and North America, Europe and swine influenza virus in Asia mixture.

and polio of the virus, such as a single gene is different from the eight influenza virus gene fragment composed of the genome, "the two major sources of gene fragments is a pig, and other parts of the source from pigs, birds were the source of the common sources and the composition of the swine influenza virus in Mexico is a hybrid," explained the high-Fu.

hybrid virus is more easily understood as a name, professional terms is called gene fragment rearrangement, that is, eight gene fragments were re-permutation and combination to form a new form of the virus. "This is the world leading to the disease a major cause of panic, and the other factors that make people feel uneasy is that the majority of deaths among adults." Fu said high.

fu seems high, since several years ago after suffering from avian influenza, epidemiology experts has been worried that in 1918 Spanish flu pandemic once again repeat itself, and it was a flu virus H1N1 is the same type, first found in the barracks, the same infection is mainly young and middle-aged.

"There are two influenza virus surface protein. H represents the hemagglutinin protein, N on behalf of neuraminidase (and related viruses), these two proteins are also two surface antigens, in accordance with of different antigens, but also had the flu virus into a different model. "Liu Wenjun said.

In addition to eight gene fragments can be from different sources, the influenza virus genome can be mutated fragment. This is why the difficult anti-influenza virus, vaccines used regardless of the reasons why.

"H on behalf of the hemagglutinin protein of 16 worldwide, N neuraminidase on behalf of the 9 species, after the order will have hundreds of different combinations." Fu said high.

It was learned that people commonly are infected with influenza virus type H1N1 and H3N2, were not uncommon, such as H2N2. The same with people, pigs, horses are susceptible to both viruses.

high-fu said that people infected with swine flu in the past occasionally have occurred, but only distributed, there is no popular trend. The major area of Mexico, swine flu, but also stated that this is the hybrid virus better adapted to an evolution of the human body.

is a new type of virus, but its route of transmission of influenza viruses with the past is the same, mainly through air and contact. French experts have pointed out that the fear of swine influenza viruses of high temperature, the consumption of pork烧熟not swine flu infection.

"a new study, we also proved that the swine influenza virus from the human influenza virus. in accordance with Genetic Comparative study of molecular evolution, the evolution of human influenza virus, influenza virus Bibi Zhu faster. On the other hand, suffers from influenza will be transmitted to pigs, but there is no evidence. "LIU Wen-jun has been engaged in animal influenza viruses, etc. Molecular evolution of pathogenicity and cross-species infection and dissemination mechanisms of research and development of antiviral research.

2005 years, Liu Wenjun made people in the Guangdong region of influenza and swine influenza virus molecular evolution study of the relevance of comparison. In this study found that the same area of swine influenza virus H3N2 or the original source of human influenza virus, influenza virus evolution is a branch of the process.

"swine flu virus would be more frequent rearrangement, have made analysis showed that five strains, including three gene rearrangements have taken place." Liu Wenjun said.

Mexico against the swine flu into China whether the issue of Liu Wenjun believe that biological evolution as a result of the long-term adaptation and the relationship between resistance to different, so different between the susceptibility of different species, and Asians whether the new type of virus susceptibility, but also still have to look into. In addition, is also not for the duration of the influenza epidemic to speculate.

At present, our country attaches considerable importance to study the virus. High-fu, the country in 2008 established a special 16 major science and technology, the major infectious diseases has also set up special; At the same time, pathogenic micro-organisms with the Chinese Academy of Sciences Key Laboratory of Immunology, also established last year to that of human, animal, virus interaction, as well as cross-border transmission of species, the immune mechanism.