Quarantined

  • The original use of the word Quarantine was the act of anchoring a ship arrived in Venice, Italy, for 40 days before landing.
  • Infectiousness of any disease is measured by the reproduction number (R0, or R naught). For example, Smallpox has an R0 of 6 whereas Measles has an R0 of 16. 
  • Vaccination, if available, and herd immunity can curb the spread of disease.
  • Big cities, with exploding population and traffic, can lead to the rapid spread of any infectious disease.

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A visual history of pandemics

A visual history of pandemics