1. The immunogenicity and reactogenicity of four COVID-19 booster vaccinations against SARS-CoV-2 variants following CoronaVac or ChAdOx1 nCoV-19 primary series.
- Author
-
Angkasekwinai N, Niyomnaitham S, Sewatanon J, Phumiamorn S, Sukapirom K, Senawong S, Toh ZQ, Umrod P, Somporn T, Chumpol S, Ritthitham K, Jantraphakorn Y, Srisutthisamphan K, and Chokephaibulkit K
- Subjects
- Humans, Female, Male, Adult, Middle Aged, BNT162 Vaccine immunology, Prospective Studies, Immunoglobulin G blood, Immunoglobulin G immunology, Vaccines, Inactivated immunology, Vaccines, Inactivated adverse effects, Vaccination, ChAdOx1 nCoV-19 immunology, SARS-CoV-2 immunology, Immunization, Secondary, COVID-19 prevention & control, COVID-19 immunology, COVID-19 Vaccines immunology, COVID-19 Vaccines adverse effects, Antibodies, Viral blood, Antibodies, Viral immunology, Antibodies, Neutralizing blood, Antibodies, Neutralizing immunology, Immunogenicity, Vaccine
- Abstract
Background: The appropriate COVID-19 booster vaccine following inactivated or adenoviral vector COVID-19 vaccination is unclear., Objective: To investigate the immunogenicity of four COVID-19 booster vaccines., Methods: We prospectively enrolled healthy adults who received a two-dose CoronaVac or ChAdOx1 8-12 weeks earlier and allocated them to receive one of the following booster vaccine: inactivated (BBIBP-CorV), ChAdOx1 or mRNA (BNT162b2 at full [30 μg] and half [15 μg] dose) vaccines. We determined the reactogenicity and the humoral (anti-receptor binding domain IgG (anti-RBD-IgG), neutralizing antibodies (nAb) against Delta, Beta and Omicron variants) and cellular immunity measuring by interferon gamma (IFN-γ) responses post-booster. AR patients., Results: Among the 352 participants (179 CoronaVac and 173 ChAdOx1 participants), 285 (81%) were female, and median age was 39 (IQR: 31-47) years. Two weeks post-booster, both 30 μg- and 15 μg- BNT162b2 induced the highest anti-RBD IgG concentration (BAU/mL); Coronavac-prime: 30 μg-BNT162b2, 5152.2 (95%CI 4491.7-5909.8); 15 μg-BNT162b2, 3981.1 (3397.2-4665.4); ChAdOx1, 1358.0 (1141.8-1615.1); BBIBP-CorV, 154.6 (92.11-259.47); ChAdOx1-prime: 30 μg-BNT162b2, 2363.8 (2005.6-2786.1; 15 μg-BNT162b2, 1961.9 (1624.6-2369.1); ChAdOx1, 246.4 (199.6-304.2); BBIBP-CorV, 128.1 (93.5-175.4). Similarly, both 30 μg- and 15 μg- BNT162b2 boosting induced the highest nAb titers against Beta, Delta and Omicron BA.1 variants and highest T-cell response at 2 weeks after boosting. While all BNT162b2 or heterologous ChAdOx1-boosted participants had nAb against Omicron, these were < 50% for BBIBP-CorV and 75% for homologous ChAdOx1-boosted participants. There was significant decrease in nAb ( > 4-fold) at 16-20 weeks post booster for all groups., Conclusions: Heterologous boosting with BNT162b2 following CoronaVac or ChAdOx1 primary series is most immunogenic. Additional studies are needed to verify the clinical efficacy and persistence of immunity following half-dose BNT162b2.
- Published
- 2024
- Full Text
- View/download PDF