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Contents and Lead Article

Contents
- Influenza surveillance and immunisation in New Zealand, 1990-1999
- Low and late influenza activity in 2000.
- Surveillance and control notes
Lead article:
Influenza surveillance and immunisation in New Zealand, 1990-1999
Information provided by influenza surveillance is essential to guide
both public health measures in the event of an influenza epidemic or
pandemic, and decisions on vaccine composition. Influenza surveillance
in New Zealand includes laboratory surveillance of influenza virus
isolates, sentinel general practice (GP) surveillance of consultations
for influenza-like illness (ILI), hospital discharge and mortality
data, and vaccine coverage surveillance. During the 10 years, 1990-99,
six influenza seasons have been dominated by influenza A(H3N2), three
by influenza B, and one by influenza A(H1N1). In 1996, influenza
A/Wuhan/359/95 (H3N2) virus caused a significant epidemic. On average,
2.7% of the population attend a GP because of an ILI during the
influenza season. A further 278 hospital admissions and 34 fatalities a
year are directly attributed to influenza, although the true impact is
much higher. High coverage with influenza vaccine is essential to
reduce the impact of this highly preventable disease, particularly for
those >=65 years of age who experience the highest levels of
hospitalisation and death.
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