… SARS-CoV-2 variant vaccines. Methods This phase 2 open-label, randomized trial enrolled
healthy adults previously vaccinated with a SARS-CoV-… COVID19 mRNA vaccine arms (50µg …

… The emergence of SARS-CoV-2 variants of … of booster doses and variant-specific vaccines.
Clinical trial participants who received a two-dose primary series of the COVID-19 vaccine …

… the effectiveness of booster doses for SARS-CoV-2 vaccines. … mRNA vaccine BNT162b2
compared with the primary vaccination … of testing positive for SARS-CoV-2 infection among …

… As booster vaccination was being scaled up, the omicron … of SARS-CoV-2 infections in
Qatar. We investigated the effectiveness of booster vaccination against symptomatic SARS-CoV-2 …

… This was definitely true for the original SARS-CoV-2 strain 10 … load declines more rapidly in
vaccinated individuals than in … Thus, with SARS-CoV-2 variants of concern, booster vaccine …

… but are restricted to homologous mRNA vaccines. We evaluated homologous and heterologous
booster vaccination in persons who had received an EUA Covid-19 vaccine regimen. …

… for SARS-CoV-2 by PCR and provided records of complete vaccination, including booster or
third, … using homologous (n=5) and heterologous (n=2) vaccination courses (appendix p 3). …

… basis and clinical impact of SARS-CoV-2 variants and … vaccine booster regimens against
different SARS-CoV-2 strains. Additionally, we reviewed potential mechanisms of vaccine-…

… vaccines, designed to target emerging SARS-CoV-2 variants as booster vaccines in participants
previously vaccinated … two doses of the prototype vaccine, mRNA-1273. The modified …

… in the pandemic, decisions on booster programmes represent real-life choices that sit at
the interface between immunological research and epidemiology data on SARS-CoV-2-related …