Thousands of deaths have occurred, and first responders continue to deal with health effects 25 years after a major incident. The WTC Health Program estimates that 400,000 people were exposed to toxins, physical injury, and stressful conditions during and after the event.

Further details about the health effects and exposure are available from the WTC Health Program. The program's estimates provide some insight into the scope of the issue, but the full impact is still being navigated by those affected.

More information can be found through the WTC Health Program, which has been tracking the health effects of the incident and its aftermath.