Real-World Effectiveness of Four Types of COVID-19 Vaccines oleh Derar H. Abdel-Qader, Hasan Abdel-Qader, Jennifer Silverthorne, Chuenjid Kongkaew, Ahmad Z. Al Meslamani, Wail Hayajneh, Adel M. Alwahadneh, Salim Hamadi, Luay Abu-Qatouseh, Riad Awad, Mohannad Al Nsour, Abdallah Alhariri, Khaldoun Shnewer, Mohammad Da’ssan, Nathir M. Obeidat, Khaldoon E. Nusair, Mothafer S. Jalamdeh, Feras Hawari, Mohammad Asad, Salah AbuRuz