1.A

Question 1

The hagerstrand model

Answer 1

1. primary stage - outbreak slows as it spreads from a fixed point - lasts for month when eventually reached enough people to spread quickly
2. condensation stage - rapid growth occurs due to contagious - due to travel, poor educations and poor sanitation
3. expansion stage - disease spread slows as pop become immune 0 due to education, quarantine and vaccination
4. saturation stage - disease stops spreading - entire pop immune or dead - no new cases as saturated

Question 2

expansion diffusion

Answer 2

a disease has a source and spreads outwards into a new area meanwhile carriers in the source remain infected - outbreak of tTB - traditional model

Question 3

relocation diffusion

Answer 3

occurs when a disease leaves the area of origin and moves to a new areas - Cholera epidemic in Haiti - o.g form Nepal

Question 4

hierarchal diffusion

Answer 4

disease spreads through an ordered sequence of places - from largest centres with higher connectivity ti more isolated areas

Question 5

contagious diffusion

Answer 5

spreads through direct contact with a carrier - strongly influenced by distance - ebola epidemic in West aftrica

Question 6

barriers to diffusion

Answer 6

• distance from source
• physical geography
• political borders
• wearing face masks
• mass vaccination
• climate
• education