title: Secondary spread of H. influenzae.
mesh_terms: D000293:Adolescent; D003428:Cross Infection / Q000209:etiology; D006192:Haemophilus Infections / Q000635:transmission*; D006193:Haemophilus influenzae; D006801:Humans; D007223:Infant; D012141:Respiratory Tract Infections / Q000635:transmission*