Naso-pharyngeal carriage of Haemophilus influenza type B.
D006193:Haemophilus influenzae; D019741:Haemophilus influenzae type b; D006801:Humans; D007251:Influenza, Human; D009305:Nasopharynx; D009666:Nose; D010614:Pharynx; D012572:School Health Services
HAEMOPHILUS INFLUENZAE; NASOPHARYNX; SCHOOL HEALTH