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- W4310030107 abstract "Abstract Objectives Several countries have authorized a booster vaccine campaign to combat the spread of COVID-19. Data on persistence of booster vaccine-induced immunity against new Omicron subvariants are still limited. Therefore, our study aimed to determine the serological immune response of COVID-19 booster after CoronaVac-priming. Methods A total of 187 CoronaVac-primed participants were enrolled and received an inactivated (BBIBP), viral vector (AZD1222) or mRNA vaccine (full-/half-dose BNT162B2, full-/half-dose mRNA-1273) as a booster dose. The persistence of humoral immunity both binding and neutralizing antibodies against wild-type and Omicron was determined on day 90– 120 after booster. Results A waning of total RBD immunoglobulin (Ig) levels, anti-RBD IgG, and neutralizing antibodies against Omicron BA.1, BA.2, and BA.4/5 variants was observed 90–120 days after booster vaccination. Participants who received mRNA-1273 had the highest persistence of the immunogenicity response, followed by BNT162b2, AZD1222, and BBIBP-CorV. The responses between full and half doses of mRNA-1273 were comparable. The percentage reduction of binding antibody ranged from 50% to 75% among all booster vaccine. Conclusions The antibody response substantially waned after 90–120 days post-booster dose. The heterologous mRNA and the viral vector booster demonstrated higher detectable rate of humoral immune responses against the Omicron variant compared to the inactivated BBIBP booster. Nevertheless, an additional fourth dose is recommended to maintain immune response against infection. Highlights The persistence of antibody responses is different among three vaccine platforms. Highly remained antibody levels were observed with the mRNA and viral vector booster. The half-dose mRNA-1273 can be used interchangeably with the full-dose mRNA-1273. The neutralizing activity against BA.5 was lower than wild type and BA.2 subvariant. A fourth dose is recommended for individuals who received an inactivated booster." @default.
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- W4310030107 date "2022-11-27" @default.
- W4310030107 modified "2023-10-15" @default.
- W4310030107 title "Immunogenicity and durability against Omicron BA.1, BA.2 and BA.4/5 variants at 3 to 4 months after a heterologous COVID-19 booster vaccine in healthy adults with a two-doses CoronaVac vaccination" @default.
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- W4310030107 doi "https://doi.org/10.1101/2022.11.24.22282735" @default.
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