CDC.gov uses the following cookies (defined and organized per the Office of Management and Budget’s “Guidance for Online Use of Web Measurement and Customization Technologies” (OMB M-10-22 pdf icon[102 KB, 9 pages]external icon) :
Single-session cookies are used for technical purposes, such as enabling better navigation through the site, facilitating the use of user accounts, and generating aggregated statistics about how the website is used. Single-session cookies may use a unique identifier, but do not publicly expose personal information.
Under the framework of OMB M-10-22, this qualifies as a Tier 1 use. pdf icon[102 KB, 9 pages]external icon
Multi-session or persistent cookies are used to recognize a browser session that was used in a previous visit to a CDC.gov web site, which can improve a user’s experience, for example, by continuing preference settings from previous visits. These persistent cookies also provide the ability for CDC to gather information on unique visitors to CDC.gov web sites.
Under the framework of OMB M-10-22, this qualifies as a Tier 2 use. pdf icon[102 KB, 9 pages]external icon
The CDC uses a third-party analytics provider (for current provider please see current third-party tools/pages list) to analyze the collected data. The third-party analytics provider does not receive personally identifiable information through these cookies.
Some pages on CDC.gov may include web content or functionality from third parties. These third parties may use web measurement and customization technologies (such as cookies) in conjunction with the provision of this content or functionality. You should consult the privacy policies of these third parties for further information. We do not knowingly use third-party tools that place a multi-session cookie prior to the user interacting with the tool unless identified on 3rd party tools site, for example by playing an embedded video. If you become aware of a third-party tool on CDC.gov that places a multi-session cookie prior to any user interaction, please contact Privacy Office (see Contact information here).
Another form of website measurement and customization technology is the use of “flash cookies” which are created by Adobe Flash, a technology that powers web content such as videos. To manage these, visit the Website Storage Settings Panel on Adobe.comexternal icon. CDC.gov does not currently use first-party flash cookies, but they may be used by embedded third-party technologies.
Cookies for Email Subscribers
Because this links cookie data with an individual user, this would qualify as a Tier 3 use under the framework of OMB M-10-22 pdf icon[102 KB, 9 pages]external icon. We would therefore only connect cookie data to individual users who have consented and opted in to receiving emails.
For data captured in this manner, we would restrict access to individual-level information to employees, contractors, and vendors subject to non-disclosure requirements who require access to this information in order to perform their official duties and exercise controls to limit what data they can view based on the specific needs of their position.
Visitors can control aspects of website measurement and customization technologies used on CDC.gov and still have access to comparable information and services on CDC.gov.
You can choose not to accept cookies from any website, including CDC.gov, by changing the settings of your browser. You can also delete cookies stored in your browser at any time.
Please use this opt-out instructionsexternal icon to get more information about cookies, including how to delete them from your computer and configure your browser to refuse them from CDC.gov or any other site.