Question

What are the mediums of the spread of disease?

Answer 1

air, water, some kind of flies & humans .........

Answer 2

Disease diffusion refers to the spread of disease from its source into new areas. It is well documented that the incidence of disease is likely to be affected by distance so that places closer to the source of a disease are most likely to see higher incidence. This can be seen in the graph to the left which shows the incidence of AIDs rates falling the further away from its source in San Francisco. It is superimposed over the typical pattern of contagious spread of disease. However, in a globalised world, increasingly connected by an integrated transport communication system there is also strong evidence to suggest that disease can spread quickly via roads at the national scale and airports at regional and global scale.