Figure 2.

Adjusted daily percent absent among elementary/middle school and high school students in the New York City school system for the 2001–02 school year, adjusted for day-of-week and clerical days. Plotted against Emergency Department visits for fever and flu-like illness among children age 5–17 and the number of influenza A and influenza B isolates identified at three World Health Organization reference virology laboratories in New York City.

Besculides et al. BMC Public Health 2005 5:105   doi:10.1186/1471-2458-5-105
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