title: Two research projects seek to improve immunization practices.
mesh_terms: D000914:Antibodies, Viral / Q000097:blood*; D001838:Bolivia; D002675:Child, Preschool; D003462:Cuba; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D010175:Pan American Health Organization; D017955:Poliovirus / Q000276:immunology*; D011055:Poliovirus Vaccine, Oral; D011247:Pregnancy; D013745:Tetanus Toxoid / Q000008:administration & dosage*
chemical_list: D000914:Antibodies, Viral; D011055:Poliovirus Vaccine, Oral; D013745:Tetanus Toxoid