title: Malaria vaccine trials: a guided step into the unknown.
mesh_terms: D000917:Antibody Formation; D002986:Clinical Trials as Topic; D006801:Humans; D007158:Immunologic Techniques; D008288:Malaria / Q000276:immunology / Q000517:prevention & control*; D010963:Plasmodium falciparum / Q000276:immunology*; D014611:Vaccination