仅仅经过确认出现鸟类暴发H5N1感染的区域,造成的接触风险很小。
Based on the grades, five zones, negligible risk zone, low risk zone, medium risk zone, high risk zone and very high risk zone are differentiated.把风险等级分为可忽略风险区、低风险区、中等风险区、高风险区和极高风险区。
Since 1992 recombinant proteins are generally used, which contain little, if any, human blood products - and thus have a negligible risk of contamination.从1992年开始,重组的蛋白质开始大量的使用,如果真有的话,也只是包含一点人类的血液制品——因此,污染的危险是可以忽视的。