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BCG vaccine and post-BCG complications among infants in Gaza Strip, 1999

R Awad1

  • 1Department of Epidemiology, Ministry of Health, Rimal Clinic, Gaza, Palestine.

Eastern Mediterranean Health Journal = La Revue De Sante De La Mediterranee Orientale = Al-Majallah Al-Sihhiyah Li-Sharq Al-Mutawassit
|February 25, 2003
PubMed

Insights

A specific batch of Bacillus Calmette-Guérin (BCG) vaccine, combined with improper administration, caused a significant increase in post-vaccination complications. Establishing an adverse event surveillance system is crucial for vaccine safety.

Area of Science:

  • Immunology
  • Vaccinology
  • Public Health

Background:

  • Post-vaccination complications following Bacillus Calmette-Guérin (BCG) administration require investigation.
  • Understanding the link between vaccine batches and administration practices is essential for public health.

Purpose of the Study:

  • To investigate the relationship between BCG vaccine administration practices, specific vaccine batches, and the occurrence of post-BCG complications.
  • To identify the root cause of an observed outbreak of BCG complications.

Main Methods:

  • A questionnaire was administered to nurses involved in BCG vaccination.
  • Case analysis of BCG complications in infants (n=552) and schoolchildren (n=97) using abstraction sheets.
  • Comparison of complication rates between different healthcare settings (UNRWA vs. governmental).

Main Results:

  • BCG complication rates were 14.7/1000 in infants and 2.5/1000 in schoolchildren in 1997.
  • Complication rates differed significantly between UNRWA (19.1/1000) and governmental health services (8.3/1000).
  • A single BCG vaccine batch (2611-11), coupled with incorrect administration, was identified as the cause of the complication outbreak.

Conclusions:

  • The study identified a specific BCG vaccine batch and administration errors as the cause of increased complications.
  • There is a clear need for a robust surveillance system to monitor adverse events following immunization.
  • Improved vaccine handling and administration protocols are necessary to prevent future outbreaks.

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