Introduction:Seasonal influenza is a prevalent and highly contagious acute respiratory disease that causes a major global disease burden.New strains of influenza viruses also have the potential to cause an influenza p...Introduction:Seasonal influenza is a prevalent and highly contagious acute respiratory disease that causes a major global disease burden.New strains of influenza viruses also have the potential to cause an influenza pandemic.Due to the high variability and the consequent uncertainty about virus strains,the prevention and control of influenza are faced with many challenges.Surveillance is considered a key strategy to lead to the prevention and control of influenza,and influenza is one of first infectious diseases to be monitored globally.Methods:The Chinese National Influenza Surveillance Network conducts routine influenza surveillance and includes 410 network laboratories and 554 sentinel hospitals based on the requirements of National Influenza Surveillance Guidelines.China and other countries submit epidemiological and virological data to the WHO FluMart database,which can be viewed online.Results:Seasonal influenza H3N2 virus was the dominant subtype in China when entering the 2019–2020 winter influenza season,while neighboring countries such as Japan and Republic of Korea reported the dominance of H1N1pdm09 and Mongolia and Russia reported a higher proportion of type B virus than type A virus.Conclusions and Implications for Public Health Practice:Asian countries entered the 2019–2020 winter influenza season with different type/subtypes of influenza virus dominant in different areas.Influenza surveillance needs to be strengthened to closely monitor changes in the antigenicity and genetic characteristics of emerging viruses.展开更多
文摘Introduction:Seasonal influenza is a prevalent and highly contagious acute respiratory disease that causes a major global disease burden.New strains of influenza viruses also have the potential to cause an influenza pandemic.Due to the high variability and the consequent uncertainty about virus strains,the prevention and control of influenza are faced with many challenges.Surveillance is considered a key strategy to lead to the prevention and control of influenza,and influenza is one of first infectious diseases to be monitored globally.Methods:The Chinese National Influenza Surveillance Network conducts routine influenza surveillance and includes 410 network laboratories and 554 sentinel hospitals based on the requirements of National Influenza Surveillance Guidelines.China and other countries submit epidemiological and virological data to the WHO FluMart database,which can be viewed online.Results:Seasonal influenza H3N2 virus was the dominant subtype in China when entering the 2019–2020 winter influenza season,while neighboring countries such as Japan and Republic of Korea reported the dominance of H1N1pdm09 and Mongolia and Russia reported a higher proportion of type B virus than type A virus.Conclusions and Implications for Public Health Practice:Asian countries entered the 2019–2020 winter influenza season with different type/subtypes of influenza virus dominant in different areas.Influenza surveillance needs to be strengthened to closely monitor changes in the antigenicity and genetic characteristics of emerging viruses.
