Are pathogens of infectious diseases, infectious and epidemic, infection often have immunity. Some infectious diseases are seasonal or local.Control of communicable diseases prevention and control is the most efficient way, due to infectious diseases in the three basic conditions: infection, transmission and vulnerable population, the lack of any one cannot send the prevalence of infectious diseases, so for the prevention of infectious diseases are also concentrated in these three areasPrevalence of communicable diseases because of their specific aspects, features and different environment, and thus have great differences in their prevention objectives. At the moment, most only to control the disease, prevention and control of infectious diseases epidemic as the goal. Rare disease as conditions mature, measures have been effective, can eliminate the requirement. The premise of rare disease when conditions are ripe, concerted efforts all over the world, you can achieve the goal of eradication.
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