Volume 9, Number 3, March 2003

Influenza AH1N2 Viruses, United Kingdom, 2001–02 Influenza Season

Joanna S. Ellis,* Adriana Alvarez-Aguero,† Vicky Gregory,† Yi Pu Lin,† A. Hay,† and Maria C. Zambon*
*Central Public Health Laboratory, London, United Kingdom; and †National Institute for Medical Research, London, United Kingdom

Figure 1. Consultation rate (per 100,000 population) for influenzalike illnesses with sentinel physicians in England in 1988–2002 (from the Royal College of General Practitioners Weekly Returns Service). Baseline activity is defined by a consultation rate <50/100,000; normal seasonal activity, 50–200/100,000; higher than seasonal activity, 200–400/100,000, and epidemic activity is defined as >400/100,000 population.

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This page last reviewed March 18, 2003

Emerging Infectious Diseases Journal
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