調(diào)查的目的是判斷牡蠣產(chǎn)地與銷售點諾瓦克病毒的發(fā)生率,預期發(fā)生率為50%時,置信度為95%,精確度為5%。本次調(diào)查列出了目標數(shù)量、樣本規(guī)格、樣本收集需求、分析方法。
部分原文報道如下:
The European Commission requested scientific technical assistance in the preparation of a survey protocol for a European unio (EU) coordinated monitoring programme on the prevalence of norovirus (NoV) in raw oysters. The objective of the survey is to estimate the European prevalence of norovirus-contaminated oysters at production areas and batches of oysters at dispatch centres, with a 95% level of confidence and a level of precision of 5% considering an expected prevalence of 50%.
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