Does booster vaccination lead to a rapid secondary recall response, indicative of immunological memory?;Is there an increase in antibody levels between day of boost and 28 days after boosting HCW that were initially primed with either the Janssen or an mRNA-based vaccine?

Does booster vaccination lead to a rapid secondary recall response, indicative of immunological memory?;Is there an increase in antibody levels between day of boost and 28 days after boosting HCW that were initially primed with either the Janssen or an mRNA-based vaccine?