The term “aggravating” means, with respect to a health condition, a health condition that existed on September 11, 2001, and that, as a result of exposure to airborne toxins, any other hazard, or any other adverse condition resulting from the September 11, 2001, terrorist attacks, requires medical treatment that is (or will be) in addition to, more frequent than, or of longer duration than the medical treatment that would have been required for such condition in the absence of such exposure.

The term “certified-eligible WTC survivor” has the meaning given such term in section 300mm–31(a)(2) of this title.

The terms “Clinical Center of Excellence” and “Data Center” have the meanings given such terms in section 300mm–4 of this title.

The term “enrolled WTC responder” means a WTC responder enrolled under section 300mm–21(a)(3) of this title.

The term “initial health evaluation” includes, with respect to an individual, a medical and exposure history, a physical examination, and additional medical testing as needed to evaluate whether the individual has a WTC-related health condition and is eligible for treatment under the WTC Program.