The cases are not linked epidemiologically. 这些病例在流行病学方面没有关联性。
Conclusions Heparin contaminated with OSCS was epidemiologically linked to adverse reactions in this nationwide outbreak. 结论:从流行病学角度分析,OSCS污染的肝素与全国范围内发生的不良反应有关。
Methods Surveying epidemiologically the area with the indirect fluorescent antibody test ( IFAT) and checking the parasite rate again in1999. 方法于1999年再次应用IFAT进行流行病学监测及原虫率考核。
Later, it promoted actions to contain rinderpest within the infected eco-systems, and to eliminate reservoirs of infection through epidemiologically and intelligence-based control programmes. 随后,它促进采取行动,把牛瘟控制在受影响的生态系统中,根据流行病学和疫情侦察开展防治计划,消除传染宿主。