The documents below provide guidance on sound surveillance methods that can foster consistency in practice and can result in data that are more accurate and comparable. They are arranged by the general categories for conducting surveillance, evaluating programs or surveillance systems, and standardizing data.

Click on the drop-down arrows ( > ) to expand the list of documents for the topic areas under the following methods:

Conducting Surveillance

How to conduct surveillance for topics such as data analysis, interpretation, and dissemination, and linking with public health action.

Evaluating Surveillance Systems

How to carry out systematic evaluation of surveillance systems to ensure that problems of public health importance are being monitored efficiently and effectively.

Standardizing Data

How to improve quality of data through standardization of case definitions and how to develop and collect data for indicators.