Guerriero, Paola, et al. “Vaccination Status Among COVID-19 Patients and Duration of Polymerase Chain Reaction Test Positivity: Evaluation of Immunization Schedule and Type of Vaccine”. Annali Di Igiene Medicina Preventiva E Di Comunità, vol. 36, no. 3, May 2024, pp. 327-34, https://doi.org/10.7416/ai.2024.2613.