A single-dose live-attenuated YF17D-vectored SARS-CoV-2 vaccine candidate.
Nature
; 590(7845): 320-325, 2021 02.
Article
in English
| MEDLINE | ID: covidwho-953381
ABSTRACT
The expanding pandemic of coronavirus disease 2019 (COVID-19) requires the development of safe, efficacious and fast-acting vaccines. Several vaccine platforms are being leveraged for a rapid emergency response1. Here we describe the development of a candidate vaccine (YF-S0) for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) that uses live-attenuated yellow fever 17D (YF17D) vaccine as a vector to express a noncleavable prefusion form of the SARS-CoV-2 spike antigen. We assess vaccine safety, immunogenicity and efficacy in several animal models. YF-S0 has an excellent safety profile and induces high levels of SARS-CoV-2 neutralizing antibodies in hamsters (Mesocricetus auratus), mice (Mus musculus) and cynomolgus macaques (Macaca fascicularis), and-concomitantly-protective immunity against yellow fever virus. Humoral immunity is complemented by a cellular immune response with favourable T helper 1 polarization, as profiled in mice. In a hamster model2 and in macaques, YF-S0 prevents infection with SARS-CoV-2. Moreover, a single dose conferred protection from lung disease in most of the vaccinated hamsters within as little as 10 days. Taken together, the quality of the immune responses triggered and the rapid kinetics by which protective immunity can be attained after a single dose warrant further development of this potent SARS-CoV-2 vaccine candidate.
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
Vaccines, Attenuated
/
Yellow Fever Vaccine
/
COVID-19 Vaccines
/
Genetic Vectors
/
SARS-CoV-2
/
COVID-19
Topics:
Vaccines
Limits:
Animals
Language:
English
Journal:
Nature
Year:
2021
Document Type:
Article
Affiliation country:
S41586-020-3035-9
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