欧洲疾控中心：使用医护人员队列进行新冠肺炎疫苗对确诊的SARS-CoV-2有效性ECDC研究的通用方案，版本3.0（英文版）

The main changes in this version compared to version 2.0 include data collection on clinical characteristics to reconstitute the acute respiratory infection (ARI) and influenza-like illness (ILI) case definitions according to the current recommendations for respiratory diseases surveillance, and additional clarifications on serology data collection section and community exposures, as well as additional analyses: restrictions by circulation of different sub-lineages of Omicron VOC, relative va