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Avian influenza virus prevalence in Ruddy Turnstones over the course of the spring stopover at Delaware Bay, (A) for 2000–2008 pooled data, and for each year sufficient serial data were available: (B) 2002, (C) 2007, and (D) 2008. Lines of fit (95% confidence interval) and prevalence (±SE) for each day (B, C, and D) or 5-day time span (A) when n≥5 are shown. All lines of fit are significant at α=0.05.
