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World Trade Center Health Program; Youth Research Cohort; Request for Information

April 2023

NIOSH Docket Number 350, CDC-2023-0027

NIOSH announces an opportunity for the public to provide information about approaches to establishing a new World Trade Center (WTC) Health Program research cohort of persons who were exposed to the September 11, 2001, terrorist attacks and were aged 21 years or younger at the time of their exposure. This research cohort will be designed to allow the Program to conduct future research studies on the health and educational impacts in the population of persons aged 21 years or younger at the time of their exposures to airborne toxins, or any other hazard or adverse condition, resulting from the terrorist attacks on September 11, 2001.

To view the notice and related materials, visit  and enter CDC-2023-0027 in the search field and click “Search.”

Public Comment Period

Comments will be accepted until 11:59 p.m. ET on January 29, 2024.

Written comments, identified by CDC-2023-0027 and docket number NIOSH-350, may be submitted by any of the following methods:

Federal rulemaking portal: Follow the instructions for submitting comments.

Instructions: All submissions received must include the agency name and docket number. All relevant comments, including any personal information provided, will be posted without change to

  • Mail: NIOSH Docket Office
    1090 Tusculum Avenue
    Cincinnati, OH 45226