Volume 19, Number 1—January 2013
Research
Automated Biosurveillance Data from England and Wales, 1991–2011
Figure 4

Figure 4. . A) Distribution of estimated linear trend parameters (units: per week) for data on 2,250 organisms (excluding 4 organisms with extreme slopes), England and Wales, 1991–2011. B) Stacked bar chart of modal seasonal period for 2,254 organisms. The black bar sections represent organisms for which the seasonal effect is statistically significant.