; and (2) in paragraph (2)(A), by striking The aggregate and inserting Except for securities of an issuer combating COVID–19, the aggregate . (c) Crowdfunding exemption with respect to COVID–19 Section 4(a)(6)(A) of the Securities Act of 1933 ( 15 U.S.C. 77d(a)(6)(A) ) is amended by inserting before the aggregate amount the following: except for transactions involving the offer or sale of securities by an issuer combating COVID–19, . (d) Exemption from joint and several liability Section 24 of the Securities Act of 1933 ( 15 U.S.C. 77x ) is amended by adding at the end the following: Notwithstanding any other provision of law, an issuer combating COVID–19 shall not be subject to joint and several liability for any claim against such issuer, other than a claim of fraud under the securities laws. . 3. COVID–19 X-prize If the Director of the Centers for Disease Control and Prevention or the Director of the National Institutes of Health determines that a person has created a vaccine for COVID–19 that cuts the incidence and mortality rate of COVID–19 by more than 50 percent and makes such vaccine widely available to the public at affordable rates, such Director shall report such determination to the President and the Secretary of the Treasury. If, after reviewing such report, the President agrees, the Secretary of the Treasury shall, without further appropriation and out of any amounts in the general fund not otherwise appropriated, pay such person $1,000,000,000. 4. GAO Study Not later than 1 year after the date of the enactment of this Act, the Comptroller General of the United States shall submit to Congress a study on the impact of this Act and the amendments made by this Act. 5. Sunset This Act and the amendments made by this Act shall have no force or effect after the earlier of— (1) the date the Secretary of the Treasury awards the prize described under section 3; and (2) the end of the 3-year period beginning on the date of enactment of this Act.