Disease Dilemmas
- Created by: CR.22
- Created on: 15-03-19 11:12
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- Disease Dilemmas
- Diffusion
- Expansion Diffusion
- Spreads outwards from the source - people remain infected as it spreads
- Relocation Diffusion
- Rarest of all 4 - when a disease is carried across barriers away from its origin
- Contagious Diffusion
- Spread of disease by direct/indirect contact
- Barriers to Diffusion
- Socio-economic
- Quarantine
- Mass vaccinations
- Curfews
- Protective clothing
- Border Checks
- Cancel big events
- Physical
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- Sea
- Climate
- Oceans
- Deserts
- Mountain Ranges
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- Socio-economic
- Expansion Diffusion
- Torsten Hägerstrand's diffusion model
- Concept 1 - The neighbourhood Effect
- Possible contact between carrier and non-carrier is determined by the number of people living in a 5x5 area and their living distance
- The closer people live the more likely the diffusion will take place
- The greater the population density the more likely the diffusion will be
- Concept 2- The spatial Logistic Curve
- The number of people infected by an epidemic follows an S curve
- There's a slow start to infection process
- As more of the susceptible population are infected the rate of diffusion accelerates rapidly
- The most susceptible people are old people and children
- Concept 3: Physical Barriers
- Progress and diffusion of a disease may be interrupted by physical barriers
- 2014 ebola outbreak was prevented by physical barriers
- The Sahara Desert
- The Atlantic Ocean
- The Central African Rainforest
- Concept 1 - The neighbourhood Effect
- Diffusion
- Physical
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- Sea
- Climate
- Oceans
- Deserts
- Mountain Ranges
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