Immunological memory is the basis of protective immunity provided by vaccines and
previous infections. Immunological memory can develop from multiple branches of the …

Abstract Coronavirus Disease 2019 (COVID-19) has been the most severe public health
challenge in this century. Two years after its emergence, the rapid development and …

Background The safety and immunogenicity of the bivalent omicron-containing mRNA-
1273.214 booster vaccine are not known. Methods In this ongoing, phase 2–3 study, we …

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) Omicron (B. 1.1. 529)
variant is highly transmissible with potential immune escape. We conducted a test-negative …

Omicron Neutralization and mRNA-1273 Boosters Neutralization of the omicron variant was
assessed in serum samples obtained from persons who had received an mRNA-1273 …

Background Vaccine effectiveness against COVID-19 beyond 6 months remains
incompletely understood. We aimed to investigate the effectiveness of COVID-19 …

Antibodies against epitopes in S1 give the most accurate CoP against infection by the SARS‐
CoV‐2 coronavirus. Measurement of those antibodies by neutralization or binding assays …

Breakthrough infections with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-
2) in fully vaccinated individuals are receiving intense scrutiny because of their importance …

Background Vaccines are critical cost-effective tools to control the coronavirus disease 2019
(COVID-19) pandemic. However, the emergence of variants of the severe acute respiratory …

Background Real-world evidence supporting vaccination against COVID-19 in individuals
who have recovered from a previous SARS-CoV-2 infection is sparse. We aimed to …