genetic variants(1) source of infection(1) vaccination(1) physician(1) VoC(1) FIVE(1) Italy(1) performed(1) Nasopharyngeal swab(1) B.1.1.7(1) Patient(1) SARS-CoV-2(1) EMA(1) approval(1) spike(1) A570D(1) variant(1) tested(1) healthcare worker(1) COVID-19 vaccination(1) healthcare(1) genotyping(1) Mild symptom(1) Diseases(1) positive(1) SARS-COV-2 infection(1) Post-vaccinal infection(1) immunization(1) carried(1) Protein(1)