National, state, and urban-area vaccination-coverage levels among children aged 19–35 months, United States, 1999
Assessment of vaccination coverage is an important component of the U.S. vaccination program and is primarily measured by the National Immunization Survey (NIS). The 1999 NIS is a nationally representative sample of children aged 19 to 35 months, verified by provider records, that is conducted to ob...
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Veröffentlicht in: | American journal of preventive medicine 2001-05, Vol.20 (4), p.88-153 |
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Sprache: | eng |
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