Variation in the Humoral Immune Response Induced by the Administration of the BNT162b2 Pfizer/BioNTech Vaccine: A Systematic Review oleh Karen Cortés-Sarabia, Mayralina Gutiérrez-Torres, Escarlet Maleny Mendoza-Renteria, Marco Antonio Leyva-Vázquez, Amalia Vences-Velázquez, Daniel Hernández-Sotelo, Fredy Omar Beltrán-Anaya, Oscar Del Moral-Hernández, Berenice Illades-Aguiar