title: Progress introducing Haemophilus influenzae type b vaccine in low-income countries, 2004-2008.
mesh_terms: D019049:Developed Countries; D006192:Haemophilus Infections / Q000517:prevention & control; D018073:Haemophilus Vaccines / Q000627:therapeutic use*; D019741:Haemophilus influenzae type b / Q000276:immunology*; D006801:Humans; D017589:Immunization Programs / Q000191:economics / Q000706:statistics & numerical data; D014944:World Health Organization
chemical_list: D018073:Haemophilus Vaccines