meningococcal vaccine(1) Enzyme-linked immunosorbent assay (ELISA)(1) ELISA(1) Free polysaccharide(1) Adenovirus dodecahedron(1) placental malaria(1) pneumococcal conjugate vaccine(1) Glycoconjugate vaccine(1) Group W meningococci(1) chondroitin sulfate(1) immunoprecipitation(1) Streptococcus pneumoniae(1) Conjugate vaccine(1) surface plasmon resonance (SPR)(1) VAR2SA(1) PCV(1) carbohydrate antigen(1) Immunological evaluation(1) chemo-enzymatic synthesis(1) CRM197(1) Virus-like particle(1)