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Smallpox during pregnancy and maternal outcomes
1Department of Medical Biometry, University of Tübingen, Tübingen, Germany. nishiura.hiroshi@uni-tuebingen.de
Emerging Infectious Diseases
|July 14, 2006
Summary
Smallpox infection during pregnancy led to a 34.3% maternal fatality rate and nearly 40% risk of miscarriage or premature birth. Vaccination before pregnancy significantly lowered the risk of death.
Area of Science:
- Obstetrics and Gynecology
- Infectious Diseases
- Epidemiology
Background:
- Smallpox poses significant risks to maternal health and pregnancy outcomes.
- Historical data is crucial for understanding the impact of infectious diseases on pregnant populations.
Purpose of the Study:
- To evaluate maternal outcomes in pregnancies complicated by smallpox.
- To assess the impact of smallpox on case fatality and pregnancy complications.
- To determine the effect of vaccination on maternal mortality.
Main Methods:
- Historical study design.
- Analysis of maternal outcomes in smallpox cases during pregnancy.
- Estimation of case fatality rates and complication proportions with confidence intervals.
Main Results:
- Overall smallpox case fatality rate in pregnancy was 34.3% (95% CI 31.4-37.1).
- Miscarriage or premature birth occurred in 39.9% of cases (95% CI 36.5-43.2).
- Pre-pregnancy vaccination was associated with a reduced risk of death.
Conclusions:
- Smallpox infection during pregnancy is associated with high maternal mortality and adverse pregnancy outcomes.
- Maternal vaccination against smallpox prior to pregnancy is a critical preventive measure.
- Historical data highlights the severe consequences of smallpox in pregnancy and the importance of vaccination.