Volume 20, Number 1—January 2014
Dispatch
Contact Tracing for Influenza A(H1N1)pdm09 Virus–infected Passenger on International Flight
Ananda G. Shankar, Kulsum Janmohamed, Babatunde Olowokure
, Gillian E. Smith, Angela H. Hogan, Valerie De Souza, Anders Wallensten, Isabel Oliver, Oliver Blatchford, Paul Cleary, and Sue Ibbotson
, Gillian E. Smith, Angela H. Hogan, Valerie De Souza, Anders Wallensten, Isabel Oliver, Oliver Blatchford, Paul Cleary, and Sue Ibbotson
Table
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 |
| 8§ | NA | NA | 25th, 4 after |
| 9¶ | 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.
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Page updated: January 03, 2014
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