【正文】 of the RNA virus. High specificity of effective vaccine research and extension, of course, is a very important means to prevent infectious disease.Three, the Middle East, respiratory syndrome and H7N9 subtype of avian influenza (most acute pathogenic) RNA virus and possible pathogenesis and its characteristics1, the Middle East, respiratory syndrome and H7N9 subtype of avian influenza and other clinical manifestations and SARS, influenza a (H1N1) and seasonal flu highly similar: both on symptoms, high fever, severe pneumonia, acute respiratory failure. H7N9 subtype of avian influenza and the Middle East respiratory syndrome pathogenesis characteristics should be similar to SARS, influenza a (H1N1), etc.2, the Middle East, respiratory syndrome and avian influenza virus (most acute pathogenic) RNA virus infection when the virus that causes and viruses have close cooperation with the corresponding organs, tissues, cells disposable damage symptoms and signs. Such as upper respiratory tract infection, pneumonia, encephalitis, diffuse intravascular dermatitis (haemorrhagic fever), mumps, etc. And its plications: failure, heart failure, renal failure, cerebral edema, shock, etc.3, have affinity to the upper respiratory tract and lungs of RNA virus, they once inhaled into the lung tissue leads to three kinds of pneumonia: aspiration pneumonia virus, immunity pneumonia and bacterial pneumonia.4, lung tissue damage immunity pneumonia is not H7N9 subtype of avian influenza and respiratory syndrome virus such as pure damage directly results in the Middle East, is the posterity H7N9 subtype virus body for the series of immune attack, virus caused by H7N9 subtype of avian influenza virus and respiratory syndrome virus infection such as Middle East part of the immune allergy (main Ⅱ allergy) damage to normal tissues, and a series of chain damage caused by a reaction, because of the virus and bronchus and lung tissue affinity is strong, antigenic specificity is higher.5, as we all know, the body39。s immune system, and the body39。s immune system to destroy affinity of human tissue cells by the virus: seasonal influenza virus, Japanese encephalitis virus, hemorrhagic fever virus, measles, mumps virus, human bird flu virus, the Spanish flu virus, respiratory syndrome virus in the Middle East and so on. RNA virus or and abnormal immune most for onetime damage tissue cells in the body, only except the AIDS virus, because it is the affinity of T cells, the body39。s not a feeling, but in 7 to 11 days condition suddenly increased, most patients or respiratory failure, because it is infringement of main parts of the lung, followed by small blood vessels, lung, kidney and other organs, cause lung oxygenation ability is poor, the body much viscera function failure.4, respiratory syndrome in the Middle East, such as H7N9 subtype avian influenza RNA virus disease onset acute and critical condition, the lethal time short, critically ill treatment is difficult.5, there is no specific vaccine against, and no specific kill H7N9 subtype of avian influenza virus and RNA viruses such as respiratory syndrome to the Middle East.6, the Middle East, respiratory syndrome and H7N9 subtype avian influenza RNA virus pathogenic virus belong to RNA viruses, RNA virus vaccine without cross immunity function, such as a/H1N1 flu vaccine for its protection.7 or more were nearly thousand samples in recent years, including H7N9 avian influenza and respiratory syndrome positive samples in the Middle East, including samples of chicken and duck samples and environmental samples, pigeons, camel samples. The uncertainty of the universality of positive samples, birds move extremely harm humans, to know people contact with birds and it has been reported in the terrible disease.8, the human experience in 2009 after the a/H1N1 flu pandemic first panic, look down on this process, to encourage people to H7N9 subtype of avian influenza and respiratory syndrome in the Middle East and so on epidemic prevention and control of paralysis, potential harm that may cause disease.9, currently on bird flu and human respiratory syndrome prevention and control measures is not scientific and the Middle East in the Middle East respiratory syndrome and high lethal H7N9 subtype avian influenza in humans is not scientific and high cost (blind cost a lot of manpower and material resources and financial resources) prevention and treatment of respiratory syndrome in the Middle East and H7N9 subtype of avian influenza infection.10, as the climate changes, the time delay, do not rule out the poisonous force of avian influenza virus and respiratory syndrome virus in the Middle East, aggressivity further enhance or mutation bring greater disaster to human beings. The respiratory syndrome in the Middle East, such as H7N9 subtype avian influenza RNA virus virulence, aggressive may be weaker than the SARS virus.Second, respiratory syndrome and H7N9 subtype avian influenza in the Middle East and so on RNA virus is not terrible1, the Middle East people are infected with respiratory syndrome and H7N9 avian