Long-term humoral immunogenicity, safety and protective efficacy of inactivated vaccine against COVID-19 (CoviVac) in preclinical studies.
Emerg Microbes Infect
; 10(1): 1790-1806, 2021 Dec.
Article
in English
| MEDLINE | ID: covidwho-1370760
ABSTRACT
The unprecedented in recent history global COVID-19 pandemic urged the implementation of all existing vaccine platforms to ensure the availability of the vaccines against COVID-19 to every country in the world. Despite the multitude of high-quality papers describing clinical trials of different vaccine products, basic detailed data on general toxicity, reproductive toxicity, immunogenicity, protective efficacy and durability of immune response in animal models are scarce. Here, we developed a ß-propiolactone-inactivated whole virion vaccine CoviVac and assessed its safety, protective efficacy, immunogenicity and stability of the immune response in rodents and non-human primates. The vaccine showed no signs of acute/chronic, reproductive, embryo- and fetotoxicity, or teratogenic effects, as well as no allergenic properties in studied animal species. The vaccine induced stable and robust humoral immune response both in form of specific anti-SARS-CoV-2 IgG and NAbs in mice, Syrian hamsters, and common marmosets. The NAb levels did not decrease significantly over the course of one year. The course of two immunizations protected Syrian hamsters from severe pneumonia upon intranasal challenge with the live virus. Robustness of the vaccine manufacturing process was demonstrated as well. These data encouraged further evaluation of CoviVac in clinical trials.
Keywords
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
Vaccines, Inactivated
/
Immunity, Humoral
/
COVID-19 Vaccines
/
SARS-CoV-2
/
COVID-19
Type of study:
Experimental Studies
/
Prognostic study
Topics:
Long Covid
/
Traditional medicine
/
Vaccines
Limits:
Animals
/
Female
/
Humans
/
Male
Language:
English
Journal:
Emerg Microbes Infect
Year:
2021
Document Type:
Article
Affiliation country:
22221751.2021.1971569
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