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Volume 10, Number 12—December 2004


Human Illness from Avian Influenza H7N3, British Columbia

S. Aleina Tweed*Comments to Author , Danuta M. Skowronski*, Samara T. David†, Andrew Larder‡, Martin Petric*, Wayne Lees§, Yan Li¶, Jacqueline M. Katz#, Mel Krajden*, Raymond Tellier**, Christine Halpert‡, Martin Hirst††, Caroline Astell††, David Lawrence*, and Annie Mak*
Author affiliations: *British Columbia Centre for Disease Control, Vancouver, British Columbia, Canada; †Health Canada Field Epidemiology Training Program, Ottawa, Ontario, Canada; ‡Fraser Health Authority, Abbotsford, British Columbia, Canada; §Canadian Food Inspection Agency, Ottawa, Ontario, Canada; ¶National Microbiology Laboratory, Winnipeg, Manitoba, Canada; #Centers for Disease Control and Prevention, Atlanta, Georgia, USA; **Hospital for Sick Children, Toronto, Ontario, Canada; ††British Columbia Cancer Agency Genome Sciences Centre, Vancouver, British Columbia, Canada

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Table 1

Characteristics of patients with suspected and confirmed A/H7N3 cases

Characteristic Cases (%) (N = 57)
Male sex 32 (58)
Median age in y (range) 33 (1–68)
Received influenza vaccine 36 (65)
>2 wk before exposure 12 (22)
Farm owner 9 (16)
Family member 11 (19)
Farm employee 14 (25)
    Farm manager 3
    Egg collector 6
    Chicken catcher 2
    Miscellaneous worker 3
Federal worker 12 (22)
    Veterinarian 4a
    Inspector 3
    General laborer 6a
    Decomposition worker 1
Other 4 (7)
Unknown 5 (9)

aIncludes confirmed A/H7N3 case.

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