title: Non-secretion of ABO antigens predisposing to infection by Neisseria meningitidis and Streptococcus pneumoniae.
mesh_terms: D000017:ABO Blood-Group System / Q000276:immunology*; D004198:Disease Susceptibility; D006801:Humans; D008589:Meningococcal Infections / Q000097:blood*; D011008:Pneumococcal Infections / Q000097:blood*
chemical_list: D000017:ABO Blood-Group System