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Efforts at rubella elimination in the United States: the impact of hemispheric rubella control
Gustavo H Dayan1, Carlos Castillo-Solórzano, Margarita Nava
1National Center for Immunization and Respiratory Diseases (proposed), Centers for Disease Control and Prevention, Atlanta, GA 30333, USA. gdayan@cdc.gov
Abstract:
We examined rubella vaccination trends, rubella surveillance, and disease patterns for the Americas, Mexico, and the United States, to evaluate the impact of hemispheric rubella control on rubella elimination in the United States during 1997-2004. In 1997, 130,375 rubella cases were reported in the Americas, with 38,042 reported in Mexico. Over the next 7 years, a rubella control initiative resulted in the administration of approximately 110 million rubella-containing vaccine doses in Latin America, with 77.7 million doses administered within Mexico. By 2004, the number of reported rubella cases had declined to 3103 in the Americas and 698 in Mexico. Concurrently, the number of rubella cases in the United States fell from 817 during 1997-1999 to <25 cases/year from 2001 onward, with loss of seasonality and geographic clustering, despite no change in vaccination rates. Implementation of rubella control strategies in the Americas, particularly in Mexico, appears to have facilitated rubella elimination in the United States.
Insights
Hemispheric rubella control initiatives, especially in Mexico, significantly reduced rubella cases. This public health effort appears to have facilitated rubella elimination in the United States by 2004.
Area of Science:
- Public Health
- Epidemiology
- Vaccinology
Background:
- Rubella (German measles) posed a significant public health concern globally.
- Maintaining high vaccination coverage is crucial for preventing rubella outbreaks.
Purpose of the Study:
- To assess the impact of rubella control in the Americas on rubella elimination in the United States.
- To analyze rubella vaccination trends, surveillance data, and disease patterns from 1997-2004.
Main Methods:
- Retrospective analysis of reported rubella cases in the Americas, Mexico, and the United States.
- Examination of rubella vaccination coverage and control initiative data during the study period.
Main Results:
- Reported rubella cases in the Americas decreased from 130,375 in 1997 to 3103 in 2004.
- Mexico administered approximately 77.7 million rubella-containing vaccine doses as part of a larger regional initiative.
- Rubella cases in the U.S. dropped from 817 (1997-1999) to below 25 cases annually by 2001, indicating elimination.
Conclusions:
- Rubella control strategies implemented across the Americas, notably in Mexico, played a crucial role in achieving rubella elimination in the United States.
- The success highlights the importance of regional cooperation in infectious disease control and elimination efforts.
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