; or (D) with reduced access to public transit as a result of the spread of COVID–19; (2) medically underserved populations (as defined in section 330(b)(3) of the Public Health Service Act (42 U.S.C 254b(b)(3))); and (3) health professional shortage areas (as defined in section 330(a) of the Public Health Service Act (42 U.S.C 254e(a))). (f) Reports (1) Report to Secretary Not later than 1 year after the date of the enactment of this Act, an entity that receives grant funds pursuant to this Act shall submit to the Secretary a report on the activities carried out using such grant funds. (2) Report to Congress Not later than December 31, 2021, the Secretary shall submit to Congress a report on the effectiveness of the activities carried out pursuant to this Act. (g) Authorization of appropriations There is authorized to be appropriated to carry out this Act $400,000,000, to remain available until expended.