The U.S. federal government announced a new research effort to examine the long‑term health consequences of the September 11, 2001 attacks on individuals who were children, teenagers, young adults, or unborn at the time. The initiative comes as the city marks 25 years since the attacks that devastated Lower Manhattan and reshaped the nation’s approach to disaster response.

The study will track health outcomes for this younger cohort, looking at conditions that may emerge decades after exposure to the dust, smoke and psychological stress of that day. Participants will include those who lived in the immediate vicinity of the World Trade Center site, as well as people who were in utero in the surrounding area, allowing researchers to assess potential impacts across a range of developmental stages.

Officials highlighted that previous investigations have centered largely on first‑responders and recovery workers, leaving a substantial gap in knowledge about how the event affected younger residents and unborn children. By focusing on this overlooked demographic, the project aims to provide data that could inform future medical screening, treatment protocols and public health policies.

The research effort will be conducted in the New York City region, with particular attention to Lower Manhattan, the epicenter of the 2001 attacks. While the federal government has funded numerous studies of post‑9/11 health issues, this is the first comprehensive attempt to isolate the experience of those who were still developing physically or mentally when the tragedy occurred. Findings are expected to be released in stages, offering insight into both immediate and delayed health effects that may have been missed by earlier, responder‑focused work.