WOLFRAM|DEMONSTRATIONS PROJECT

Dynamical Network Design for Controlling Virus Spread

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1. Central & Western
960
2. Eastern
370
3. Southern
760
4. Islands
980
5. Kwai Tsing
821
6. Kowloon City
257
7. Kwun Tong
870
8. North
110
9. Sai Kung
920
10. Sham Shui Po
245
*11. Sha Tin
0
12.Tuen Mun
0
13.Tai Po
0
*14. Tsuen Wan
0
15. Wan Chai
0
16. Wong Tai Sin
0
17. Yuen Long
0
18. Yau Tsim Mong
0
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This Demonstration shows the dynamics of the spread of the SARS virus in Hong Kong's 18 districts when the optimal resources allocation is used. In the simulation, the color green represents an infection-free district, that is, one in which the number of infected people is smaller than one. For infected districts, shades of red are used to indicate the level of infection. Darker red means that there are more infected people in the region and lighter red means that fewer people are infected. The viewer can see that the virus is stopped very quickly using the optimal design: the regions quickly turn green regardless of the initial conditions.
The viewer should note that the initial number of infectives in each district can be set using the sliders on the left side of the screen.