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Efficacy and Safety of a Booster Regimen of Ad26.COV2.S Vaccine against Covid-19

2022-01-31 infectious diseases Title + abstract only
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BackgroundDespite the availability of effective vaccines against coronavirus disease 2019 (Covid-19), the emergence of variant strains and breakthrough infections pose a challenging new reality. Booster vaccinations are needed to maintain vaccine-induced protection. MethodsENSEMBLE2 is an ongoing, randomized, double-blind, placebo-controlled, phase 3 pivotal trial including crossover vaccination after emergency authorization of Covid-19 vaccines. Adults aged [≥]18 years were randomized to re...

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