Heterologous boosting of neutralizing activity against Delta and Omicron SARS-CoV-2 variants in CoronaVac-primed adults; a randomized study with SCB-2019 vaccine
Abstract:Background: The global COVID-19 pandemic has peaked but some countries such as China are reporting serious infectious outbreaks due to SARS-CoV-2 variants. Waning vaccine-derived immunogenicity and mutations in variants allowing vaccine evasion require new booster immunization approaches. We compared homologous and heterologous boosting in adults previously fully primed with a whole-virus inactivated COVID-19 vaccine. Methods: At multiple sites in the Philippines we enrolled 430 adults (18-72 years) immunized … Show more
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