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Volume 17, Number 7—July 2011

Research

Effectiveness of Seasonal Influenza Vaccine against Pandemic (H1N1) 2009 Virus, Australia, 2010

James E. FieldingComments to Author , Kristina A. Grant, Katherine Garcia, and Heath A. Kelly
Author affiliations: Author affiliations: Victorian Infectious Diseases Reference Laboratory, North Melbourne, Victoria, Australia (J.E. Fielding, K.A. Grant, K. Garcia, H.A. Kelly); The Australian National University, Canberra, Australian Capital Territory, Australia (J.E. Fielding)

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Table 2

Crude and adjusted vaccine effectiveness against pandemic (H1N1) 2009 virus, Australia, 2010

Effectiveness Influenza vaccine effectiveness, % (95% confidence interval)
Seasonal Monovalent Both Any
Crude
80 (39–93)
42 (−62 to 79)
84 (26 to 96)
70 (42 to 84)
Adjusted*
0–19 y Undefined† 44 (−231 to 91) Undefined‡ −41 (−549 to 69)
20–64 y 89 (50 to 98) 56 (−88 to 90) 81 (7 to 96) 81 (52 to 92)
All ages 79 (33 to 93) 47 (−62 to 82) 81 (7 to 96) 67 (33 to 84)

*Adjusted for month of swab collection.
†No controls vaccinated.
‡No controls or case-patients vaccinated.

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