Media type: E-Article Title: Estimating conditional vaccine effectiveness Contributor: Ioannidis, John P. A. imprint: Springer Science and Business Media LLC, 2022 Published in: European Journal of Epidemiology Language: English DOI: 10.1007/s10654-022-00911-3 ISSN: 0393-2990; 1573-7284 Keywords: Epidemiology Origination: Footnote: