text: "I understand why some countries want to vaccinate children and adolescents?
classes:  No, the number of vaccines is increasingly deficient, so I understand why some countries want to vaccinate children and adolescents.  Also, the number of vaccines is increasingly deficient, so I understand why some countries want to vaccinate children and adolescents.  Yes, the number of vaccines is increasingly deficient, so I understand why some countries want to vaccinate children and adolescents.