; or (B) the assessment or care of the health of human beings. (e) Effective date (1) In general This section shall take effect 90 days after the date of the enactment of the Pandemic and All-Hazards Preparedness and Advancing Innovation Act of 2018 . (2) Application This section shall apply to a claim for harm only if the act or omission that caused such harm occurred on or after the effective date described in paragraph (1). . (b) GAO study Not later than one year after the date of enactment of this Act, the Comptroller General of the United States shall conduct a review of— (1) the number of health care providers who register under the Emergency System for Advance Registration of Volunteer Health Professionals under section 319I of the Public Health Service Act ( 42 U.S.C. 247d–7b ) in advance to provide services during a public health emergency; (2) the number of health care providers who are credentialed to provide services during the period of a public health emergency declaration, including those who are credentialed though programs established in the Emergency System for Advance Registration of Volunteer Health Professionals under such section 319I and those credentialed by authorities within the State in which the emergency occurred; (3) the average time to verify the credentials of a health care provider during the period of a public health emergency declaration, including the average time pursuant to the Emergency System for Advance Registration of Volunteer Health Professionals under such section 319I and for an individual’s credentials to be verified by an authority within the State