About WH

WH is a modeling framework for the simulation of disease spread in randomly mixing populations. WH operates at the level of the individual animal, and incorporates sources of individual-level variation such as variability in the durations of incubating and infectious periods, the stochastic nature of disease spread among individuals, the effects of vaccination, and disease mortality.

WH extends modeling concepts used previously (e.g., Abbey, 1952; Perez et al., 2002, Bates et al., 2003; Carpenter et al., 2004). These earlier models are either deterministic, or draw a single value from each individual-level distributions and apply those same values to every individual within an iteration of the model: that is, these earlier models treat all individuals as though they are completely equivalent. By constrast, in WH, all parameters related to disease spread, durations of disease states, and effects of vaccination are applied to each individual, so that the variablility among individuals is more realistically represented.

Obtaining WH

WH is open source software and is released under the terms of the GNU General Public License.

An executable version of WH for Microsoft Windows may be downloaded from this website. Source code for WH for Microsoft Windows is also available.

Documentation

A user's guide and a description of the conceptual model implemented in the WH application are currently under development: please refer to Documentation for details.


About WH Download the WH application Documentation Download WH source code Citing WH The NAADSM project Search this site:	About WH WH is a modeling framework for the simulation of disease spread in randomly mixing populations. WH operates at the level of the individual animal, and incorporates sources of individual-level variation such as variability in the durations of incubating and infectious periods, the stochastic nature of disease spread among individuals, the effects of vaccination, and disease mortality. WH extends modeling concepts used previously (e.g., Abbey, 1952; Perez et al., 2002, Bates et al., 2003; Carpenter et al., 2004). These earlier models are either deterministic, or draw a single value from each individual-level distributions and apply those same values to every individual within an iteration of the model: that is, these earlier models treat all individuals as though they are completely equivalent. By constrast, in WH, all parameters related to disease spread, durations of disease states, and effects of vaccination are applied to each individual, so that the variablility among individuals is more realistically represented. Obtaining WH WH is open source software and is released under the terms of the GNU General Public License. An executable version of WH for Microsoft Windows may be downloaded from this website. Source code for WH for Microsoft Windows is also available. Documentation A user's guide and a description of the conceptual model implemented in the WH application are currently under development: please refer to Documentation for details.