Gene sequence variation of human avian influenza virus in China but no human to human transmission

Introduction: Beijing, Nov 28 (Xinhua) - the Ministry of health today announced on its website that the gene sequence of H5N1 virus isolated from the samples of human avian influenza patients in China has changed to some extent, according to the "reply to the media's concerns about the prevention and control of human infection with highly pathogenic avian influenza" But the mutation does not have the ability to cause human to human transmission According to the document, laboratory analysis shows that H5N1 virus isolated from human avian influenza patients in China has a high degree of homology with the virus isolated from poultry samples in epidemic areas However, compared with H5N1 avian influenza virus in Vietnam, the gene sequence of the virus has changed to some extent But the mutation does not have the ability to cause human to human transmission At present, no human cases of H5N1 avian influenza virus have been found in Europe In addition, since 1997, human cases of highly pathogenic avian influenza virus (H5N1) have been found in Hong Kong, Thailand, Vietnam, Cambodia, Indonesia and Mainland China So far, the total number of cases is more than 150 The results of epidemiological investigation and laboratory research on these cases show that direct contact with infected birds and their secretions and excreta, inhalation of virus particles in their secretions or excreta, is the main way and way of human infection with avian influenza The general public who are not exposed to sick or dead birds will not be infected with avian influenza virus.