Epidemiological characteristics of influenza in Shaanxi Province during the winter of 2017－2018

• Published in: Xi'an jiao tong da xue xue bao. Journal of Xi'an Jiaotong University (medical sciences). Yi xue ban no. 1; p. 131
• Main Authors: SHI, Wei, MA, Ping, ZHANG, Lei, WANG, Shu, ZHU, Ni, XU, Jing, Peng-bo, YU, Shao-bai, ZHANG, XU, Yi
• Format: Journal Article
• Language: Chinese
• Published: Xi'an Xi'an Jiaotong University 01.01.2020
• Subjects: Epidemiology; Influenza; Surveillance; Shaanxi China
• ISSN: 1671-8259
• DOI: 10.7652/jdyxb202001025

Objective: To understand the epidemiological characteristics of influenza in Shaanxi Province, during the winter of 2017－2018, so as to help update the government policies for influenza control. Methods: Data on weekly influenza surveillance from October 2015 to April 2018 were collected from Shaanxi Influenza Surveillance System. Data concerning patients with influenza-like illness (ILI), influenza virus positive rates and outbreaks during 2015-2018 were analyzed and compared. Results: In the above-mentioned winter, the average percentage of visits for ILI at 18 hospitals where sentinel surveillance program had been set was 4.78%，which was above the level of the same period in the previous five years. The positive rates of influenza virus among samples collected from ILI outpatients were 35.19%, with the proportions of Yamagata as 15.39%, H1N1 as 14.23%, H3N2 as 4.92%, and Victoria as 0.52%. A total of 19 influenza outbreaks were reported in the winter period, with 45% occurring in elementary schools. Patien