世卫组织：全球流感活动增加，主要由甲流病毒引起

Core Insights - The World Health Organization reported an increase in global influenza activity since October, with most detected viruses being of the influenza A type [1] - The proportion of the H3N2 subtype of influenza A virus has been rising in multiple countries and regions [1] - Genetic sequencing data indicates a significant evolution of the H3N2 virus since August, although current epidemiological data does not show an increase in disease severity [1] Summary by Categories Global Influenza Activity - There has been a notable increase in global influenza activity since October [1] - The majority of detected influenza viruses are of the influenza A type [1] H3N2 Subtype Insights - The H3N2 subtype of influenza A virus is increasingly prevalent in various countries and regions [1] - The number of K sublineage strains of the H3N2 virus detected has increased since August [1] Epidemiological Data - Despite the evolution of the H3N2 virus, current data does not indicate a rise in the severity of diseases caused by it [1]