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[Influenza surveillance].

F Shen1

  • 1Shanghai Hygiene and Antiepidemic Center.

Zhonghua Liu Xing Bing Xue Za Zhi = Zhonghua Liuxingbingxue Zazhi
|December 1, 1992
PubMed
Summary
This summary is machine-generated.

Influenza A (H3N2) and (H1N1) epidemics alternated in Shanghai from 1982-1990, peaking in summer and winter. Understanding these patterns aids in predicting future outbreaks and vaccine development.

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Area of Science:

  • Virology
  • Epidemiology

Context:

  • Analysis of influenza A (H3N2) and (H1N1) epidemics in Shanghai from 1982 to June 1990.
  • Observation of alternating epidemic cycles lasting one to two years for each subtype.
  • Isolation of several new influenza virus variants during the study period.

Purpose:

  • To analyze the temporal patterns and characteristics of influenza epidemics in Shanghai.
  • To identify the seasonality of influenza A (H3N2) and (H1N1) outbreaks.
  • To provide insights for predicting future influenza epidemics and informing vaccine preparation.

Summary:

  • Seven influenza A (H3N2) and four influenza A (H1N1) epidemics occurred in Shanghai between 1982 and 1990.
  • Influenza A (H3N2) and (H1N1) viruses alternated, with each subtype's epidemic lasting one to two years.

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  • Epidemic peaks were observed in July-August and late winter/early spring, with summer outbreaks potentially seeding epidemics in northern regions.

    • Impact:

    • Highlights the cyclical nature of influenza A subtypes in Shanghai.
    • Suggests a link between Shanghai's summer/winter epidemics and outbreaks in northern hemisphere regions.
    • Emphasizes the importance of epidemiological data for influenza prediction and vaccine development.