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Great Britain
England
Incidence
Cross-Sectional Studies
Socioeconomic Factors
Risk Assessment
Retrospective Studies
Disease Outbreaks
Infants
Haemophilus influenzae
Human Influenza
Haemophilus Infections
Uterine Cervical Neoplasms
Severe Acute Respiratory Syndrome
Population Surveillance
Vaccination
Hospitalization
Mass Screening
Haemophilus Vaccines
Questionnaires
Co-Publications
15
7
5
4
3
2
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