Availability of Weekly Counts of Reported Diseases from Any U.S. Location, 1888-2011

Each concentric circle represents a decade, starting with 1888 in the center. No single disease was reported weekly throughout the entire period, and for many diseases, the type of reports changed over time, as represented by different colors: red represents reports of death, and other colors represent reports of cases in different numbers of disease categories (e.g., hepatitis A and B) as follows: black, 1 category; green, 2; blue, 3; and orange, more than 3.

 

Availability of Weekly Counts of Reported Diseases from Any U.S. Location, 1888-2011

The Project Tycho® database is funded by the Bill & Melinda Gates Foundation and the National Institutes of Health

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