[vc_row][vc_column][vc_column_text][pdf-embedder url=”https://www.ehhd.eu/wp-content/uploads/2020/09/WHO-2019-nCoV-Ethics_criteria-2020.1-eng.pdf” title=”Key criteria for the ethical acceptability of COVID-19 human challenge studies”][/vc_column_text][/vc_column][/vc_row]