Immunogenicity of Mix-and-Match CoronaVac/BNT162b2 Regimen versus Homologous CoronaVac/CoronaVac Vaccination: A Single-Blinded, Randomized, Parallel Group Superiority Trial by Samar Samoud, Jihene Bettaieb, Mariem Gdoura, Ghassen Kharroubi, Feriel Ben Ghachem, Imen Zamali, Ahlem Ben Hmid, Sadok Salem, Ahmed Adel Gereisha, Mongi Dellagi, Nahed Hogga, Adel Gharbi, Amor Baccouche, Manel Gharbi, Chadha Khemissi, Ghada Akili, Wissem Slama, Nabila Chaieb, Yousr Galai, Hechmi Louzir, Henda Triki, Melika Ben Ahmed

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