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BCG vaccination and the EPI

P B Fourie

    South African Medical Journal = Suid-Afrikaanse Tydskrif Vir Geneeskunde
    |September 5, 1987
    PubMed

    Insights

    Bacille Calmette-Guérin (BCG) vaccination is compulsory for newborns in South Africa, with over 80% coverage. While its effectiveness against tuberculosis in infants is not fully known, current vaccination strategies are deemed necessary.

    Area of Science:

    • Immunology
    • Public Health
    • Epidemiology

    Background:

    • Bacille Calmette-Guérin (BCG) vaccination has been mandatory for newborns in South Africa since 1973.
    • Current BCG vaccination coverage exceeds 80%, yet its precise effectiveness in preventing tuberculosis (TB) in young children remains undetermined.
    • Small-scale studies suggest approximately 60% protection against infant TB, but these findings lack generalizability.

    Purpose of the Study:

    • To evaluate the effectiveness of BCG vaccination in preventing tuberculosis in infants.
    • To assess the feasibility of reducing or withdrawing BCG vaccination policies in South Africa.
    • To recommend optimal BCG vaccination strategies and data management for tuberculosis control.

    Main Methods:

    • Review of existing literature on BCG vaccination coverage and effectiveness in South Africa.
    • Analysis of tuberculosis prevalence and infection risk among Southern African children.
    • Evaluation of current BCG vaccination policies, including schedules and revaccination protocols.

    Main Results:

    • The contribution of BCG vaccination to the overall decline in tuberculosis rates is minimal and should not be used to measure Expanded Programme on Immunisation (EPI) success.
    • Due to high prevalence and infection risk, reducing or withdrawing BCG vaccination is not feasible in South Africa.
    • The existing strategy of compulsory BCG vaccination at birth, with subsequent revaccinations, is considered adequate and necessary.

    Conclusions:

    • The current comprehensive BCG vaccination strategy in South Africa is essential and adequate for tuberculosis prevention.
    • Standardized immunization data recording and improved information exchange between EPI and TB control programs are crucial.
    • Further research is needed to precisely quantify BCG effectiveness against diverse forms of tuberculosis in infants within the South African context.

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