the event of an infectious disease outbreak outside the United States with pandemic potential, the President shall designate agencies to lead response efforts as follows: (1) The United States Agency for International Development shall serve as the lead agency for the United States international response, relief, and recovery efforts associated with the potential pandemic outbreak. In this capacity, the United States Agency for International Development shall— (A) support activities, as necessary and appropriate, including immediate disaster assistance and humanitarian response needs in highly affected countries, including testing, treatment, and assistance with preventative care units and community care facilities