42 U.S. Code § 300hh - Public health and medical preparedness and response functions
The Secretary of Health and Human Services shall lead all Federal public health and medical response to public health emergencies and incidents covered by the National Response Plan developed pursuant to section 314(6)  of title 6, or any successor plan.
The Secretary, in collaboration with the Secretary of Veterans Affairs, the Secretary of Transportation, the Secretary of Defense, the Secretary of Homeland Security, and the head of any other relevant Federal agency, shall establish an interagency agreement, consistent with the National Response Plan or any successor plan, under which agreement the Secretary of Health and Human Services shall assume operational control of emergency public health and medical response assets, as necessary, in the event of a public health emergency, except that members of the armed forces under the authority of the Secretary of Defense shall remain under the command and control of the Secretary of Defense, as shall any associated assets of the Department of Defense.
 See References in Text note below.
Section 314(6) of title 6, referred to in subsec. (a), was in the original “section 502(6) of the Homeland Security Act of 2002”, and was translated as meaning section 504(6) of Pub. L. 107–296, to reflect the probable intent of Congress and the renumbering of section 502 as 504 by Pub. L. 109–295, title VI, § 611(8), Oct. 4, 2006, 120 Stat. 1395.
2006—Pub. L. 109–417 amended section generally. Prior to amendment, section consisted of subsecs. (a) to (d) relating to a national preparedness plan for carrying out health-related activities to prepare for and respond effectively to bioterrorism and other public health emergencies.