Abstract Coronavirus disease 2019 (COVID-19) has become a global pandemic disease.
SARS-CoV-2 variants have aroused great concern and are expected to continue spreading …

Vaccines are proving to be highly effective in controlling hospitalization and deaths
associated with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection …

Background COVID-19 vaccines show excellent efficacy in clinical trials and effectiveness in
real-world data, but some people still become infected with SARS-CoV-2 after vaccination …

Objectives Highly effective vaccines against severe acute respiratory syndrome coronavirus
2 (SARS-CoV-2) have been developed but variants of concerns are worrisome, especially B …

Vaccination has proven effective against infection with SARS-CoV-2, as well as death and
hospitalisation following COVID-19 illness. However, little is known about the effect of …

Summary Background The UK COVID-19 vaccination programme has prioritised vaccination
of those at the highest risk of COVID-19 mortality and hospitalisation. The programme was …

Background Phase 3 trials found mRNA-1273 was highly effective in preventing COVID-19.
We conducted a prospective cohort study at Kaiser Permanente Southern California (KPSC) …

Abstract Background Coronavirus disease 2019 (COVID-19) vaccines have been proven to
decrease the severity of acute-phase infection; however, little is known about their effect on …

Associations between vaccine breakthrough cases and infection by different SARS
coronavirus 2 (SARS-CoV-2) variants have remained largely unexplored. Here we analysed …

The efficacy of COVID-19 mRNA vaccines is high, but breakthrough infections still occur. We
compared the SARS-CoV-2 genomes of 76 breakthrough cases after full vaccination with …