Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
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A lock (
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connected to the .gov website. Share sensitive
information only on official, secure websites.
Left: A simple geographic grid with 25 blocks (grid elements). Right: Example of the relative availability of an infected animal to infected a healthy animal a distance, x, away. The width of the geographic boxes, b, is 10 and the decay of the transmission kernel is 3.
