Figure 2.

An example of an outbreak curve of case numbers from the Dominican Republic is shown here. The number of new cases crosses the “historical” +2SD line from week 1 to 17 several times before, in week 18, the case numbers definitively rise.

Badurdeen et al. BMC Public Health 2013 13:607   doi:10.1186/1471-2458-13-607
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