Disease Diffusion

Question 1

What are the 4 types of diffusion

Answer 1

Expansion, relocation, contagious and hierarchical

Question 2

Define expansion diffusion and give an example

Answer 2

There is one place of origin and the disease remains there as well as spreading overtime

An outbreak of TB

Question 3

Define relocation diffusion and an example

Answer 3

A disease that is spreading by leaping from one place to another.

2010 Haiti cholrea epidemic spread from Nepal

Question 4

Define contagious diffusion and give an example

Answer 4

Spread by direct contact and the influence is strongest at the place of origin. Influence lessens as you get further away from the place of origin

2014-5 Ebola epidemic in W. Africa

Question 5

Define hierarchical diffusion and give an example

Answer 5

A disease which spreads throughout a class or group. Can also be channeled by road, air or rail transport.

2009 H1N1 flu virus became a pandemic through flight routes causing 12 500 deaths