Investigation on a seasonal influenza accompanying with the first locale novel A/H1N1 influenza outbreak in China

• Published in: Zhōnghuá yùfáng-yīxué zázhì Vol. 43; no. 10; p. 852
• Main Authors: Yuan, Jun, Li, Mei-xia, Liu, Yu-fei, Di, Biao, Xiao, Xiao-ling, Mao, Xin-wu, Wu, Ye-jian, Xie, Hua-ping, Xie, Zhao-jun, Zhang, Hao, Liu, Jian-ping, Li, Hai-lin, Shen, Ji-chuan, Yang, Zhi-cong, Wang, Ming
• Format: Journal Article
• Language: Chinese
• Published: China 01.10.2009
• Subjects: Adolescent; Adult; China - epidemiology; Community-Acquired Infections - epidemiology; Disease Outbreaks; Female; Humans; Influenza A Virus, H1N1 Subtype; Influenza, Human - epidemiology; Male; Middle Aged; Young Adult; China
• ISSN: 0253-9624

To timely summarize past experience and to provide more pertinent reference for control and prevention in A/H1N1 cases in influenza season. During May 25 to 31, 2009, 2 secondary community cases caused by a influenza A/H1N1 imported case. In the close contacts of 3 A/H1N1 cases, 14 had some aspirator symptoms onset, such as fever (> or = 37.5 degrees C), cough, sore throat and etc. Laboratory tests excluded the infection of A/H1N1 influenza. For throat swab test for the 14 cases, 7 were tested for seasonal influenza virus. A face-to-face or telephone interview was conducted by CDC staff to collect information of 62 close contacts. Of 14 fever cases, there was no significant by differences by age[15-age group: 19.2% (5/26), over 25-age group: 25.0% (9/36); chi(2) = 0.287, P = 0.592]; by sex group [24.0% (6/25) for male and 21.6% (8/37) for female; chi(2) = 0.048, P = 0.826], by working units [dressing and design, photograph, saleroom and others, consumer group: 42.1% (8/19), 27.3% (3/11), 12.5% (2/16) and 6.3%