RT Journal Article SR Electronic T1 A single-dose live-attenuated YF17D-vectored SARS-CoV2 vaccine candidate JF bioRxiv FD Cold Spring Harbor Laboratory SP 2020.07.08.193045 DO 10.1101/2020.07.08.193045 A1 Lorena Sanchez Felipe A1 Thomas Vercruysse A1 Sapna Sharma A1 Ji Ma A1 Viktor Lemmens A1 Dominique van Looveren A1 Mahadesh Prasad Arkalagud Javarappa A1 Robbert Boudewijns A1 Bert Malengier-Devlies A1 Suzanne F. Kaptein A1 Laurens Liesenborghs A1 Carolien De Keyzer A1 Lindsey Bervoets A1 Madina Rasulova A1 Laura Seldeslachts A1 Sander Jansen A1 Michael Bright Yakass A1 Osbourne Quaye A1 Li-Hsin Li A1 Xin Zhang A1 Sebastiaan ter Horst A1 Niraj Mishra A1 Lotte Coelmont A1 Christopher Cawthorne A1 Koen Van Laere A1 Ghislain Opdenakker A1 Greetje Van de Velde A1 Birgit Weynand A1 Dirk E. Teuwen A1 Patrick Matthys A1 Johan Neyts A1 Hendrik Jan Thibaut A1 Kai Dallmeier YR 2020 UL http://biorxiv.org/content/early/2020/07/09/2020.07.08.193045.abstract AB The explosively expanding COVID-19 pandemic urges the development of safe, efficacious and fast-acting vaccines to quench the unrestrained spread of SARS-CoV-2. Several promising vaccine platforms, developed in recent years, are leveraged for a rapid emergency response to COVID-191. We employed the live-attenuated yellow fever 17D (YF17D) vaccine as a vector to express the prefusion form of the SARS-CoV-2 Spike antigen. In mice, the vaccine candidate, tentatively named YF-S0, induces high levels of SARS-CoV-2 neutralizing antibodies and a favorable Th1 cell-mediated immune response. In a stringent hamster SARS-CoV-2 challenge model2, vaccine candidate YF-S0 prevents infection with SARS-CoV-2. Moreover, a single dose confers protection from lung disease in most vaccinated animals even within 10 days. These results warrant further development of YF-S0 as a potent SARS-CoV-2 vaccine candidate.Competing Interest StatementThe authors have declared no competing interest.