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Volume 16, Number 3—March 2010

Dispatch

Surveillance Lessons from First-wave Pandemic (H1N1) 2009, Northern California, USA

Roger BaxterComments to Author 
Author affiliation: Kaiser Permanente Vaccine Study Center, Oakland, California, USA

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Figure

A) Influenza A testing in Kaiser Permanente Northern California division (KPNC), 2009. Shown are total numbers of specimens sent, number of specimens positive for influenza A, and percentage of specimens positive for influenza A. B) Outpatient visits for influenza-like illness (fever, influenza, or upper respiratory infection) per 1,000 members, percentage of all hospitalizations with a diagnosis of pneumonia or influenza (P&I), and percentage of specimens positive for influenza A, KPNC, 200

Figure. A) Influenza A testing in Kaiser Permanente Northern California division (KPNC), 2009. Shown are total numbers of specimens sent, number of specimens positive for influenza A, and percentage of specimens positive for influenza A. B) Outpatient visits for influenza-like illness (fever, influenza, or upper respiratory infection) per 1,000 members, percentage of all hospitalizations with a diagnosis of pneumonia or influenza (P&I), and percentage of specimens positive for influenza A, KPNC, 2009. C) Influenza-related telephone calls to KPNC, 2009, and percentage of specimens positive for influenza A.

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