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Published on: September 19, 2016
Incidence of childhood tuberculosis after neonatal BCG vaccination
Insights
Neonatal BCG vaccination significantly reduces tuberculosis risk in children. Routine vaccination at St Mary's Hospital showed a substantial decrease in tuberculosis incidence compared to selective vaccination practices.
Area of Science:
- Pediatrics
- Immunology
- Public Health
Background:
- BCG vaccination policies varied in Manchester hospitals.
- Routine neonatal BCG was offered at St Mary's Hospital (SMH).
- Selective BCG vaccination was practiced for specific ethnic groups and family histories at other hospitals.
Purpose of the Study:
- To evaluate the effectiveness of neonatal BCG vaccination in preventing tuberculosis.
- To compare tuberculosis incidence rates based on vaccination practices and birthplace.
Main Methods:
- Retrospective cohort study of children born in Manchester between 1965-1980.
- Analysis of tuberculosis cases (1975-1980) among children aged 0-14 years.
- Comparison of incidence rates between children born at SMH and other hospitals.
Main Results:
- Overall tuberculosis incidence was less than half among children born at SMH.
- Children born and vaccinated at SMH had a tuberculosis rate less than one-quarter of those born elsewhere.
- Children with South Asian surnames also benefited from reduced tuberculosis risk.
Conclusions:
- Neonatal BCG vaccination is highly effective in preventing tuberculosis.
- Routine neonatal BCG vaccination offers significant public health benefits.
- Targeted vaccination strategies may not capture the full protective potential of BCG.
Abstract:
Neonatal BCG vaccination has long been offered routinely to children born at St Mary's Hospital (SMH), Manchester, England, whereas the city's other obstetric hospitals have generally restricted this procedure to children of Asian origin and those with a family history of tuberculosis. Among children aged 0-14 years who had been born to Manchester residents in 1965-80, 65 presented with tuberculosis in 1975-80 whilst still resident in the city. The estimated incidence rate was less than half as high among all children born at SMH as among those not born there, largely because the rate for those born and vaccinated at SMH was less than one-quarter of that for those born elsewhere. Children with Bangladeshi, Indian, or Pakistani surnames also shared in the reduced risk associated with vaccination. These findings strongly support the effectiveness of neonatal BCG vaccination.
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