Determinants of Obtaining COVID-19 Vaccination among Health Care Workers with Access to Free COVID-19 Vaccination: A Cross-Sectional Study oleh Mariam R. Elkhayat, Maiada K. Hashem, Ahmed T. Helal, Omar M. Shaaban, Ahmed K. Ibrahim, Taghreed S. Meshref, Hussein Elkhayat, Mohamed Moustafa, Mohammed Nahed Attia Mohammed, Azza M. Ezzeldin, Hebatallah G. Rashed, Alaa Bazeed, Islam H. Ibrahim, Ahmed Mokhtar Mahmoud, Moaiad Eldin Ahmed Mohamed, Reem Sayad, Shimaa A. Elghazally