Virus Spread (simple)_Final

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WHAT IS IT?

This is a model of the spread of a viral infection within a population.

HOW IT WORKS

When an infected (red) person comes into direct contact with a non-infected (Blue) person the non-infected (blue) person will become red, indicating they too are now infected.

HOW TO USE IT

For this model you are able to adjust the number of persons bewteen 1 - 100. You may also adjust the spead of the model. This model also has the ability to observe "contact Tracing" by clikcing the "Connections" box which will show which person infected whom throught the model.

THINGS TO NOTICE

The spread of the virus hits exponential growth at a minimim threshold of persons. Can you determine what that threshold is?

THINGS TO TRY

(suggested things for the user to try to do (move sliders, switches, etc.) with the model)

EXTENDING THE MODEL

(suggested things to add or change in the Code tab to make the model more complicated, detailed, accurate, etc.)

NETLOGO FEATURES

(interesting or unusual features of NetLogo that the model uses, particularly in the Code tab; or where workarounds were needed for missing features)

RELATED MODELS

(models in the NetLogo Models Library and elsewhere which are of related interest)

CREDITS AND REFERENCES

(a reference to the model's URL on the web if it has one, as well as any other necessary credits, citations, and links)

Comments and Questions

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Click to Run Model

turtles-own [
  virus? ;; Ture or False? Turtle has the virus
]

to setup ;; this procedure sets up simulation anew
  clear-all
  create-turtles number-of-agents [setxy random-xcor random-ycor
  set virus? false ;; all turtles enter world without virus
    set shape "person"
  ]
  ask one-of turtles [set virus? true] ;; one unlucky turtle will enter world infected w/ virus
  ask turtles [recolor]
  reset-ticks
end 

to go
  if all? turtles [virus?] [stop] ;; will end simulation after all turtles are infected
  ask turtles [ move ]
  ask turtles [spread]
  ask turtles [recolor]
  tick
end 

to move
  right random 50
  left random 50
  fd 1
end 

to spread
  ifelse virus? [] [ ;; if infected touches other infected do nothing, otherwise run following procedure
  if any? other turtles-here with [virus?] ;; asks if there are any other turtles in the same patch (space) as them with the virus
  [set virus? true
      if connections [ask self [ create-links-from other turtles-here with [virus?]]]
  ]
  ]
end 

to recolor
  ifelse virus? [set color red] [set color blue]
end

There is only one version of this model, created over 4 years ago by Julian Wallace.

Attached files

File	Type	Description	Last updated
Virus Spread (simple)_Final.png	preview	Preview for 'Virus Spread (simple)_Final'	over 4 years ago, by Julian Wallace	Download

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