Section, act July 1, 1944, ch. 373, title VI, § 644, formerly § 624, as added Aug. 18, 1964, Pub. L. 88–443, § 3(a), 78 Stat. 459, and renumbered § 644, June 30, 1970, Pub. L. 91–296, title II, § 201, 84 Stat. 344, provided for research, experiments and demonstrations in utilization of medical facilities, authorization, grants-in-aid, amounts, payment, conditions, authorization of appropriations, and right of recovery of United States Government. See section 242b of this title.

Provisions similar to those comprising this section were contained in a prior section 291n, act July 1, 1944, ch. 373, title VI, § 636, as added Oct. 25, 1949, ch. 722, § 5, 63 Stat. 900; amended Oct. 6, 1961, Pub. L. 87–395, § 4, 75 Stat. 825, prior to the general amendment of this subchapter by Pub. L. 88–443.

Repeal effective with respect to appropriations for fiscal year ending after June 30, 1967, see section 3(b) of Pub. L. 90–174, set out as an Effective Date of 1967 Amendment note under section 246 of this title.