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WHO估计,每年全世界小儿麻痹症(小麻)病例超过25万例。自1955年广泛使用了灭活疫苗,1966年使用减毒活疫苗以来,美国及其他发达国家的小麻发病率明显下降。1975年西半球19个国家有小麻,1984年仅11个国家有小麻。这些成功促使美洲的泛美卫生组织(PAHO)在1985年制定一个目标,计划至1990年在美洲本土消灭小麻野毒株的传播。建立地区及国家的监测系统。要求监测系统对所有急性弛
WHO estimates more than 250,000 cases of poliomyelitis (marijuana) worldwide each year. Since the widespread use of the inactivated vaccine in 1955 and the live attenuated vaccine in 1966, the incidence of marijuana in the United States and other developed countries has dropped significantly. There were 19 small cannabis in 19 countries in the western hemisphere in 1975 and only 11 in 1984. These successes have prompted the Pan American Health Organization (PAHO) of the Americas to set a goal in 1985 that it plans to eliminate the spread of the cannabis genome in the Americas by 1990. Establish regional and national monitoring systems. Requires monitoring system for all acute relaxation