; (ii) at least 1 public health expert; and (iii) at least 1 economic policy expert. (B) Sense of Congress It is the sense of Congress that individuals appointed to the Commission should be prominent United States citizens, with national recognition and significant depth of experience in such professions as governmental service, public health, scientific research, public administration, intelligence gathering, commerce, national security, and foreign affairs. (5) Timeline for appointment All members of the Commission shall be appointed not later than 30 days after the date of the expiration of the public health emergency declared by the Secretary of Health and Human Services under section 319 of the Public Health Service Act ( 42 U.S.C. 247d ) on January 31, 2020, with respect to COVID–19, and not earlier than such date of expiration. (6) Vacancies Any vacancy in the Commission shall not affect its powers, but shall be filled in the same manner in which the original appointment was made. (c) Meetings (1) Initial meeting The Commission shall meet and begin the operations of the Commission within 45 days after the appointment of all Commission members. (2) Additional meetings After the initial meeting of the Commission, the Commission shall meet upon the call of the chair or a majority of the members of the Commission. (3) Quorum Six members of the Commission shall constitute a quorum. 5. Functions of the Commission The functions of the Commission are to— (1) conduct an investigation that— (A) addresses the purposes described in section 3; (B) investigates relevant facts and circumstances relating to the emergence and spread of COVID–19 in the United States, and the response to the COVID–19 pandemic by the Federal Government and, as appropriate, State, Tribal, territorial, and local governments, including any relevant legislation, Executive order, regulation, plan, policy, practice, or procedure; (C) may include relevant facts and circumstances relating to— (i) public health agencies; (ii) health care agencies