Our study performed on a central-European cohort is in line with the data on the recently  published US-American and Australian cohorts and accordingly, confirms and extends the knowledge on  the  B  cell-response  against  SARS-CoV-2.  Demonstrating  the  persistence  of  SARS-CoV-2-specific  B  cell- response,  our  results point  towards  an  additional  hallmark  of  immunization  beyond  specific  serum  antibodies.