The study must determine prevalence and mortality from data already held
What the document says“determine, to the extent possible, the prevalence of and mortality from the cancers specified in paragraph (2) among covered individuals by using available sources of data, which may include-- (A) health care and other administrative databases of the Department of Veterans Affairs, the Department of Defense, and the individual Services, respectively; (B) the national death index maintained by the National Center for Health Statistics of the Centers for Disease Control and Prevention”
Subsection (b)(3), the third of three things the study must do, qualified by "to the extent possible". The sources listed are permissive rather than required: the text says the data "may include" them. A third source, subparagraph (C), is the study conducted under section 750 of the William M. (Mac) Thornberry National Defense Authorization Act for Fiscal Year 2021.
What the document actually says“determine, to the extent possible, the prevalence of and mortality from the cancers specified in paragraph (2) among covered individuals by using available sources of data, which may include-- (A) health care and other administrative databases of the Department of Veterans Affairs, the Department of Defense, and the individual Services, respectively; (B) the national death index maintained by the National Center for Health Statistics of the Centers for Disease Control and Prevention”
Then the study must count how many of these fliers got each cancer. It must count how many died of it. It must use data that is already on hand.
The law names places to look. Two are the health records kept by the VA and by the armed forces. One is a list of deaths kept by the CDC.
No action is recorded against this proposal. That is not evidence that none has been taken, and nobody has yet read it against the record. See what the tracker does not yet cover.