Volume 9, Number 3—March 2003
Dispatch
Persistence of Virus-Reactive Serum Immunoglobulin M Antibody in Confirmed West Nile Virus Encephalitis Cases
Figure

Figure. Scatterplot of anti–West Nile virus immunoglobulin M positive-to-negative (P/N) values of individual serum specimens over time. Dotted line represents P/N=3.0 cut-off.
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