Related references
Note: Only part of the references are listed.
Article
Biochemistry & Molecular Biology
Markus Hoffmann et al.
Summary: The Omicron variant of SARS-CoV-2 is spreading rapidly and shows resistance to most therapeutic antibodies. It also evades neutralization by antibodies induced by infection or vaccination more efficiently than the Delta variant. This suggests that therapeutic antibodies may not be effective against the Omicron variant, and double vaccination with BNT162b2 may not provide adequate protection against severe disease caused by this variant.
Letter
Immunology
Chloe Dimeglio et al.
CLINICAL INFECTIOUS DISEASES
(2022)
Article
Immunology
Lu Lu et al.
Summary: Immune sera from BNT162b2 and Coronavac recipients showed reduced neutralizing antibody titers against the omicron variant. The presence of the spike R346K mutation did not affect the neutralization susceptibility.
CLINICAL INFECTIOUS DISEASES
(2022)
Article
Infectious Diseases
Eliseo Albert et al.
Summary: This study examined the immune responses of elderly people in nursing homes following the administration of the Comirnaty (R) COVID-19 vaccine. The results showed that the vaccine was highly immunogenic, with a high detection rate of antibodies in nursing home residents. The study also found that residents without detectable antibodies still had S-reactive T cells, indicating a potential cellular immune response.
CLINICAL MICROBIOLOGY AND INFECTION
(2022)
Letter
Infectious Diseases
Chloe Dimeglio et al.
JOURNAL OF INFECTION
(2022)
Article
Multidisciplinary Sciences
Delphine Planas et al.
Summary: The Omicron variant of SARS-CoV-2, identified in November 2021, has spread rapidly worldwide and shows resistance to most therapeutic monoclonal antibodies and vaccine-elicited antibodies. However, it can be neutralized by antibodies generated by a booster vaccine dose.
Article
Multidisciplinary Sciences
Sandile Cele et al.
Summary: The study found that the Omicron variant has reduced neutralizing effectiveness in individuals vaccinated with Pfizer BNT162b2, but those who had previously been infected with SARS-CoV-2 showed better neutralization against Omicron.
Review
Immunology
Paul Moss
Summary: T cell immunity plays a central role in controlling SARS-CoV-2 infection, with early responses correlating with protection. T cell memory provides broad recognition of viral proteins, limiting the impact of viral variants and offering protection against severe disease. Current COVID-19 vaccines elicit robust T cell responses, contributing to the prevention of hospitalization or death. Therefore, the importance of T cell immunity may have been underestimated.
Article
Biochemistry & Molecular Biology
Samuel M. S. Cheng et al.
Summary: Specific antibody levels against the SARS-CoV-2 Omicron variant decrease significantly after two doses of BNT162b2 or CoronaVac vaccines, but can be markedly increased with a booster dose of BNT162b2. Individuals who previously received two doses of BNT162b2 or CoronaVac showed reduced serum antibody titers against Omicron, while a BNT162b2 booster dose increased the antibody levels in the majority of individuals. This suggests mRNA vaccine boosters may be necessary in countries primarily using CoronaVac vaccines to combat the spread of Omicron.
Article
Infectious Diseases
Deborah Cromer et al.
Summary: By analyzing data on in-vitro neutralization and clinical protection, the study found that neutralizing activity against the ancestral SARS-CoV-2 is highly correlated with neutralization of variants of concern, and can still predict the vaccine's protection against these variants. Simulation results suggest that booster vaccination for previously infected individuals can provide higher levels of protection compared to primary vaccination. Although the protection may decrease within the first year after vaccination, the current vaccines can still offer robust protection in the medium term.
Article
Immunology
Estela Gimenez et al.
Summary: A third dose of Comirnaty vaccine greatly increases antibody levels and neutralizing antibody titers against multiple variants, but has limited impact on S-reactive T-cell immunity in nursing home residents.
CLINICAL INFECTIOUS DISEASES
(2022)
Article
Multidisciplinary Sciences
Beatriz Sanchez-Sendra et al.
Summary: Immunosenescence may affect vaccine-induced humoral immune responses. A study found that elderly individuals vaccinated with Comirnaty COVID-19 vaccine had lower neutralizing antibody titers against Beta, Gamma, Delta, and Epsilon variants. Age, frailty, and comorbidities did not significantly impact the neutralizing antibody activity.
SCIENTIFIC REPORTS
(2022)
Article
Infectious Diseases
Wan Ni Chia et al.
Summary: The study investigated the dynamics of neutralising antibody response in patients who have recovered from COVID-19, finding great variations and suggesting that predicting immune longevity can only be accurately determined at the individual level. The findings emphasize the importance of public health and social measures in the ongoing pandemic outbreak response, and may have implications for the longevity of immunity after vaccination.
Article
Biochemistry & Molecular Biology
Shuo Feng et al.
Summary: Defined levels of SARS-CoV-2-specific binding and neutralizing antibodies elicited by the COVID-19 vaccine were identified as correlates of protection against symptomatic infection. Higher levels of immune markers were correlated with a reduced risk of symptomatic infection. The data can be used to extrapolate efficacy estimates to new populations.