analyses were used to identify risk factors for the development of varicella zoster virus-related morbidity and mortality.
RESULTS:We identified 935 patients admitted for varicella zoster virus infection among 7.7 million pregnancy admissions, representing an incidence of 1.21 cases per 10,000 pregnancies (95% confidence interval [CI] 1.13-1.29). The incidence of varicella zoster virus pneumonia was 2.5% (95% CI 1.6-3.7). There were no maternal deaths recorded during the 8-year study period. There were no significant risk factors identified for those who developed varicella zoster virus pneumonia compared with those who had an uncomplicated varicella zoster virus infection during pregnancy.CONCLUSION: The incidence of varicella zoster virus pneumonia and varicella zoster virus infection associated with maternal death is significantly lower than previously estimated.
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