Despite timely immunization programs, and efficacious vaccines conveying protection
against SARS-CoV-2 infection, breakthrough infections in vaccinated individuals have been …

Breakthrough infections with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-
2) variants have been reported frequently in vaccinated individuals with waning immunity. In …

Background A cluster of over a thousand infections with the SARS-CoV-2 delta variant was
identified in a predominantly fully vaccinated population in Provincetown, Massachusetts in …

Background Data on cellular immune responses in persons with severe acute respiratory
syndrome coronavirus 2 (SARS-CoV-2) infection following vaccination are limited. The …

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 …

The effectiveness of inactivated SARS-CoV-2 vaccines against the Delta variant, which has
been associated with greater transmissibility and virulence, remains unclear. We conducted …

Abstract SARS-CoV-2 variant B. 1.617. 2 (delta) is associated with higher viral loads and
increased transmissibility relative to other variants, as well as partial escape from polyclonal …

The Delta variant of SARS-CoV-2 has caused many breakthrough infections in fully
vaccinated individuals. While vaccine status did not generally impact the number of viral …

Infectious viral load (VL) expelled as droplets and aerosols by infected individuals partly
determines transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) …

Inactivated coronaviruses, including severe acute respiratory syndrome coronavirus 1
(SARS-CoV-1) and Middle East respiratory syndrome coronavirus (MERS-CoV), as potential …