Next month marks 15 years since the Sept. 11 terrorists attacks.
Nearly 3,000 people were killed in the attacks, but since then, tens of thousands more have experienced related health problems.
More than 5,400 people have now been diagnosed with 9/11-related cancers, with some having more than one type of cancer.
The majority of those diagnosed are first responders or volunteers who worked in the aftermath of the attacks at the World Trade Center, the Pentagon and near Shanksville, Pa.
More than 12,000 people have been diagnosed with 9/11-related mental issues and more than 3,200 people have breathing or digestive issues.
Some 75,000 people have enrolled in the CDC's World Trade Center Health program. The program provides health care, medical monitoring and treatment to thousands of people directly affected by the attacks.