论文部分内容阅读
流行病学监测和流行预测是一项重要的防疫实践和流行病学研究工作,目的是通过人群易感(或免疫)水平调查、感染情况(如带菌情况)调查和社会—环境凋查,掌握有关资料,预测其流行状态,临视其发展趋势,提出预防对策和措施。白喉主要是通过空气飞沫传播的人类传染病,在大规模白喉类毒素预防接种开展以前,其流行姿态取决于人群免疫水平及传染源(包括病人及带菌者)的数量之间的动力学过程,当然人口密度、交往频度、密切接触条件是否
Epidemiological surveillance and epidemiological forecasting are important epidemic prevention epidemiological and epidemiological studies aimed at assessing population susceptibility (or immunization) levels, surveys of infection (such as carriage) and socio-environmental investigations Relevant data to predict the prevalence of its status, adhering to the development trend, put forward preventive measures and measures. Diphtheria is primarily a human-borne infectious disease that spreads through droplets of air and its prevalence depends on the dynamics of population immunity and the number of infectious agents (including patients and carriers) prior to the start of large-scale diphtheria toxoid vaccination Of course, population density, frequency of contacts, close contact conditions are