The WTC Health Program serves four groups of people affected by the 9/11 attacks:

• FDNY Responders,
• WTC General Responders,
• WTC Survivors (lived, worked, or went to school in NYC Disaster Area or were present in the dust or dust cloud), and
• Pentagon/Shanksville Responders

https://www.cdc.gov/wtc/index.html

Handbook for Applicants (updated April 2023)
available in english, spanish, polish, chinese
https://www.cdc.gov/wtc/handbook.html