🦠microbiology review

Pandemic disease

Written by the Fiveable Content Team • Last updated August 2025
Written by the Fiveable Content Team • Last updated August 2025

Definition

A pandemic disease is an infectious disease that has spread across multiple countries or continents, affecting a large number of people. It often results in significant social, economic, and health impacts globally.

5 Must Know Facts For Your Next Test

  1. Pandemic diseases can arise from new pathogens to which populations have little to no preexisting immunity.
  2. The World Health Organization (WHO) is responsible for declaring a pandemic.
  3. Notable historical pandemics include the Spanish flu of 1918 and the COVID-19 pandemic.
  4. Pandemics can be caused by various types of infectious agents, including viruses, bacteria, and parasites.
  5. Effective control measures for pandemics often include vaccination, quarantine, travel restrictions, and public health campaigns.
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