Inclusion Criteria:  - Any person, male or female, over 18 years of age who underwent vaccination and  anti-SARS-CoV-2 serological test after vaccination  having already given their consent for their biological resources to be:  stored in a biocollection of the Microbiology Technical Platform (PTM) having received an approval from the CPP Est-IV and declared to the Ministry of Education and Research under reference No. DC2009-1002; subsequently reused, as well as the anonymized associated data, for research purposes  Exclusion Criteria:  Inability to give clear information (person in an emergency, difficulty understanding the subject, etc.) Person under safeguard of justice Person under guardianship or curatorship-