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Volume 20, Number 1—January 2014

Contact Tracing for Influenza A(H1N1)pdm09 Virus–infected Passenger on International Flight

Ananda G. Shankar, Kulsum Janmohamed, Babatunde OlowokureComments to Author , Gillian E. Smith, Angela H. Hogan, Valerie De Souza, Anders Wallensten, Isabel Oliver, Oliver Blatchford, Paul Cleary, and Sue Ibbotson
Author affiliations: Health Protection Agency, West Midlands Region, Birmingham, UK (A.G. Shankar, K. Janmohamed, B. Olowokure, G.E. Smith, V. De Souza, S. Ibbotson); Health Protection Agency, Southwest Region, Gloucester, UK (A.H. Hogan, A. Wallensten, I. Oliver); Swedish Institute for Communicable Disease Control, Solna, Sweden (A. Wallensten); NHS National Services Scotland, Glasgow Scotland, UK (O. Blatchford); Health Protection Agency, Northwest Region, Liverpool, UK (P. Cleary)

Main Article


Selected characteristics of persons with confirmed cases of influenza A(H1N1)pdm09 virus infection, United Kingdom, April 2009*

Case-patient no. Symptomatic during flight No. rows from index case-patient Day of symptom onset, April 2009, no. days before/after flight
1† Yes 18th, 3 before
2‡ No Same 23rd, 2 after
3 No 2 behind 24th, 3 after
4 No 4 in front 26th, 5 after
5 No 4 in front 24th, 3 after
6 No 5 behind 22nd, 1 after
7 No 8 behind 24th, 3 after
NA NA 25th, 4 after
NA NA 26th, 5 after

*Characteristics were determined during flight-related contact tracing. NA, not applicable.
†Case-patient 1, the index patient, had the first laboratory-confirmed case of A(H1N1)pdm09 infection in the United Kingdom.
‡Case-patient 2 was the traveling companion of case-patient 1.
§Case-patient 8 was not on the flight and is a secondary case-patient who is believed to have been exposed to the virus by case-patient 2.
¶Case-patient 9 was not on the flight and is believed to have been exposed to the virus by a passenger who was on the flight but who had test results negative for A(H1N1)pdm09 virus.

Main Article

Page created: January 03, 2014
Page updated: January 03, 2014
Page reviewed: January 03, 2014
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