Epi Curves

People infected with the outbreak strain of E. coli O157, by date of illness onset*

*n=9 for whom information was available as of February 24, 2016. Some illness onset dates have been estimated from other reported information.

Illnesses that began after February 16, 2016 might not yet be reported due to the time it takes between when a person becomes ill and when the illness is reported. This takes an average of 2 to 3 weeks.