The infectious disease is still a formidable enemy which is threatening the human life and health, especially the incidence of national infectious disease remains high in developing countries. Outburst of SARS of 2003, pig's streptococcus and poultry flu will infect the incident in 2005, will remind us to pay close attention to the tendency of the infectious disease. Change with the living environment and make a variation by oneself pathogenically and microbially, the not merely new infection etiology appears frequently, there are more than 40 kinds of emerging infectious diseases in the whole world at present, among them there is half already prevailing in our country. Also 30 kinds of new infectious diseases will happen in the following 20 years. And the old incidence of infectious diseases , such as tuberculosis , venereal disease ,etc. all demonstrate the ascendant trend , some spread through sex intercourse among them the disease will rise by a large margin , venereal disease patient's number...
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