Evaluation of a rubber nitrile stopper as container-closure system of Gavac® vaccine by Pérez-Sánchez, Amaury, Alfaro-Martínez, Arlenis, Segura-Silva, Rutdali María, Zamora-Sánchez, Jesús, Pérez-González, Eikel, Martínez-Armas, Lidiana, Salinas-Rodríguez, Diasmarys, Moreira-Rubio, Alain