Jahnz-Różyk, Karina, and Joanna Zarzycka. “Patients’ Profiles in Whom It Is Worth to Use Oral Oral Immunization With Bacterial Extract to Prevent Respiratory Infections”. Medycyna Faktow (J EBM) 10, no. 3(36) (September 30, 2017): 289-292. Accessed May 17, 2024. https://journalsmededu.pl/index.php/jebm/article/view/2141.