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Diffusing deadly diseases: AIDS
- It is time to close the book on infectious diseases, declare the war against pestilence
(old diseases such as plague) won, and shift national resources to such chronic
problems as cancer and heart disease.
- People living with HIV by WHO Region
- Highest to lowest values
- Africa (especially Sub-Saharan Africa; 25.6 million people)
- Americas
- South East Asia
- Europe
- Eastern Mediterranean
- Western Pacific
- The medicine took a long time to make because it is expensive and people in the Global
South where people suffer a lot from this is where they can barely afford the drug.
- In 2016, 37 million people already had the disease, 1.8 million were newly infected and
there were 1 million deaths.
- The most deadly infectious disease ever, worse than France’s plague.
- Spatial (Space) diffusion (spreading of something)

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- By understanding how different locations interact with one another one can
understand how phenomena or traits in one location spatially diffuse to another.
- Understanding this process of interaction is necessary in knowing how diseases
geographically diffuse.
- In 1854, Dr John Snow made a map of cholera (infected through water) outbreak
and discovered the importance of spatial interactions
- Global Diffusion of HIV from Congo to Haiti in North America / Europe
- Trans-African highway (connecting East/Central Africa to Western Africa) for
labour and shipment of goods.
- Different types of diffusion partners
- Hierarchical spread of a phenomenon down an urban hierarchy (diffusion
occurs first between similar sized cities, then lower sized cities, and finally to the
smallest cities in the urban system).
- Contagious spreads continually from a single point (like the ripple from pebble
thrown into a pond).
- But, what best represented the diffusion of AIDS?
- Maps initial HIV incidence (the occurrence, rate or frequency) as it initially
follows hierarchical form (hits big cities first).

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Diffusing deadly diseases: AIDS - It is time to close the book on infectious diseases, declare the war against pestilence (old diseases such as plague) won, and shift national resources to such chronic problems as cancer and heart disease. - People living with HIV by WHO Region - - Highest to lowest values - Africa (especially Sub-Saharan Africa; 25.6 million people) - Americas - South East Asia - Europe - Eastern Mediterranean - Western Pacific The medicine took a long time to make because it is expensive and people in the Global South where people suffer a lot from this is where they can barely afford the drug. - In 2016, 37 million people already had the disease, 1.8 million were newly infected and there were 1 million deaths. - - The most deadly infectious disease ever, worse than France’s plague. Spatial (Space) diffusion (spreading of something) - By unde ...
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