Population
3501 patients with acute flaccid paralysis in Cambodia, Vietnam, and Laos
Design
Other
Follow-up
1992 to 1998
Authors
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Surveillance data suggest immunization-driven interruption of wild poliovirus; leaves open need for sustained global confirmation before declaring eradication.
The study demonstrates the drastic decrease and likely interruption of wild poliovirus transmission in the Western Pacific Region following extensive immunization.
Hagiwara et al. (1999) studied this question.
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