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[An epidemiologic study on an outbreak of measles in a particular group of infants]
1Haidian District Hygiene and Epidemic Prevention Station, Beijing.
Insights
A 1992 measles outbreak in Beijing highlighted the risks of inadequate immunization. Vaccinated infants showed protection, emphasizing the need for widespread vaccination to prevent future measles outbreaks.
Area of Science:
- Pediatrics
- Epidemiology
- Public Health
Context:
- A measles outbreak occurred at the Beijing Children Welfare House between March 23rd and April 27th, 1992.
- The outbreak affected 18 infants, representing 4.8% of the total infant population, with 11 cases in infants under 8 months.
Purpose:
- To investigate the cause and characteristics of a measles outbreak in a vulnerable infant population.
- To assess the effectiveness of vaccination in preventing measles complications.
Summary:
- The outbreak originated externally, spreading due to a lack of planned immunization and a high proportion of unprotected infants.
- Infants experienced severe symptoms and complications, though prognosis was favorable.
- Vaccinated, albeit handicapped, infants demonstrated strong protection against natural measles exposure.
Impact:
- Highlights the critical role of timely and comprehensive immunization programs in preventing infectious disease outbreaks in institutionalized children.
- Underscores the susceptibility of unvaccinated infant populations to severe measles infection and complications.
- Provides evidence for the efficacy of measles vaccination in protecting even high-risk groups.
Abstract:
An outbreak of measles broke out and prevailed in the Beijing Children Welfare House from March 23rd to April 27th, 1992. The 18 victims accounted for 4.8% of the whole infant population in the Welfare House, 11 of them being babies of less than 8 months. One third of the attacked babies were in bad condition and were hospitalized in the observation room. The clinical manifestations indicated that severe symptoms, more complications but favourable prognosis were characteristic of the infant patients. Based on the epidemiologic study and serological test, it was found that the outbreak and spread of the measles originated from outside the Welfare House. It was also found that the vaccinated handicapped infants exposed to natural measles were highly protected. This investigation leads to the conclusion that the cause of this measles outbreak was laid to the vacancy of planning immunization and the existence of a large number of non-protected babies.