AUTHOR=Baay Marc , Neels Pieter TITLE=Controlled Human Infection to Speed Up SARS-CoV-2 Vaccine Development JOURNAL=Frontiers in Immunology VOLUME=12 YEAR=2021 URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2021.658783 DOI=10.3389/fimmu.2021.658783 ISSN=1664-3224