Epidemiological and clinical characteristics of the outbreak of 2009 pandemic influenza A (H1N1) at a middle school in Luoyang, China

Public Health
C WangW Li

Abstract

To describe the epidemiological and clinical characteristics of 2009 H1N1 influenza, particularly the incubation period and the duration of symptoms, and to assess the public health response to this outbreak. A retrospective cohort study was conducted among all students and employees in a middle school by telephone survey and laboratory inspection. Nasopharyngeal specimens were collected and tested, and real-time reverse transcriptase polymerase chain reaction testing was performed to confirm the viral infection. The epidemiological and clinical characteristics were obtained through a telephone survey, and the incubation period and the duration of symptoms associated with 2009 H1N1 influenza were estimated by parametric distribution. In total, 253 cases of influenza-like illness were found among students and employees, and 79 of these cases were confirmed as H1N1 infection through laboratory inspection. The response rate for the telephone survey was 93.48% for the students (2586/2768) and 85.87% for the employees (158/184). The average attack rate was 9.22% (253/2744). The main reported symptoms were fever (100%), cough (74.68%), sore throat (59.49%), headache (56.96%) and myalgia/arthralgia (51.90%). No complications were repo...Continue Reading

References

Mar 13, 2009·Epidemiology·Benjamin J CowlingGabriel M Leung
Jul 15, 2009·Statistics in Medicine·Nicholas G ReichRon Brookmeyer
Dec 25, 2009·Emerging Infectious Diseases·Alejandro Gómez-GómezDaniel E Noyola
Jan 1, 2010·The New England Journal of Medicine·Justin LesslerN Thompson
Jun 19, 2010·The New England Journal of Medicine·Benjamin J CowlingJoseph S M Peiris
Aug 14, 2010·The Journal of Infectious Diseases·Dennis L ChaoIra M Longini

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Citations

May 1, 2013·American Journal of Epidemiology·Jens W LevyTawee Chotipitayasunondh
Oct 17, 2015·BMC Research Notes·Tran Nhu DuongBabatunde Olowokure
Jul 16, 2014·Infection Control and Hospital Epidemiology : the Official Journal of the Society of Hospital Epidemiologists of America·Geoffrey TaylorUNKNOWN Canadian Nosocomial Infection Surveillance Program
Jun 30, 2016·International Journal of Infectious Diseases : IJID : Official Publication of the International Society for Infectious Diseases·Alaa Badawi, Seung Gwan Ryoo
Feb 7, 2020·Scientific Reports·Kristen K Coleman, William V Sigler

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