The data on the realization of the program of the prevention of HIV infection among intravenously injecting drug users in the South-Western administrative district of Moscow are presented. In the course of the realization of the project drawn up in accordance with this program the information package permitting the collection, analysis and transmission of the necessary information on the epidemic situation and leading risk factors in the zone of the action of the project has been compiled, and on the basis of this information the tactics and strategy of preventive measures have been worked out. The main advantage of the information system thus developed is the possibility of its use in computers of any class, in any operational system, as well as its use in Internet.
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