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Investigation of an Outbreak of 2009 Pandemic Influenza A Virus (H1N1) Infections among Healthcare Personnel in a Chicago Hospital

  • Shelley S. Magill (a1), Stephanie R. Black (a2), Matthew E. Wise (a1), Alexander J. Kallen (a1), Soo-Jeong Lee (a1), Tracie Gardner (a1) (a3), Farah Husain (a1), Arjun Srinivasan (a1), Susan I. Gerber (a2) and Michael Jhung (a1)...


In May 2009, we investigated a hospital outbreak of pandemic H1N1 (pH1N1) infection among healthcare personnel (HCP). Thirteen (65%) of 20 HCP with pH1N1 infection had healthcare-associated cases, which were primarily attributed to transmission among HCP. Eleven (55%) of HCP with pH1N1 infection worked for 1 day or more after the onset of illness. Personnel working with mild illness may have contributed to transmission among HCP.


Corresponding author

Centers for Disease Control and Prevention, 1600 Clifton Road NE, Mailstop A-24, Atlanta, GA 30333 (


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1.Apisarnthanarak, A, Mundy, LM. Outbreak of influenza A (2009) H1N1 among Thai healthcare workers: is it time to integrate a vaccination program? Infect Control Hosp Epidemiol 2010;31:854856.
2.Centers for Disease Control and Prevention. Novel influenza A (H1N1) virus infections among health-care personnel—United States, April-May 2009. MMWR Morbid Mortal Wkly Rep 2009;58:641645.
3.Weingarten, S, Riedinger, M, Bolton, LB, Miles, P, Ault, M. Barriers to influenza vaccine acceptance: a survey of physicians and nurses. Am J Infect Control 1989;17:202207.
4.Centers for Disease Control and Prevention. Guidelines and recommendations: prevention strategies for seasonal influenza in healthcare settings, Accessed October 18, 2010.
5.Centers for Disease Control and Prevention. Interim guidance for infection control for care of patients with confirmed or suspected novel influenza A (H1N1) virus infection in a health-care setting; May 13, 2009; updated October 14, 2009; most recent update July 15, 2010. Accessed July 29, 2009.


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