Q:

Influenza pandemic occurs after every 7 – 10 years. This kind of disease distribution in time is known as:

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Influenza pandemic occurs after every 7 – 10 years. This kind of disease distribution in time is known as:


  1. Secular trend
  2. Short time fluctuation
  3. Cyclical trend
  4. Seasonal trend
  5. Endemicity

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c) Cyclical trend

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