may be used to offset the costs related to reductions in laboratory productivity resulting from interruptions or shutdowns of research activity in fiscal year 2020: Provided further , That funds made available under this heading may be transferred to the accounts of the Institutes and Centers of the National Institutes of Health (“NIH”): Provided further , That the transfer authority in the preceding proviso is in addition to any other transfer authority available to the NIH: Provided further , That of the amount made available under this heading, the Director of NIH shall transfer not less than $2,500,000,000 to the accounts of the Institutes and Centers of the NIH in proportion to the amounts otherwise made available to such Institutes and Centers under the heading “National Institutes of Health” in division A of the Further Consolidated Appropriations Act, 2020 ( Public Law 116–94 ): Provided further , That of the amount made available under this heading, the Director of NIH shall transfer to “Buildings and Facilities” an amount equal to the amount made available for buildings and facilities at the NIH in section 237 of division A of such Act: Provided further , That the Director of the NIH shall provide a briefing to the Committees on Appropriations of the House of Representatives and the Senate at least one week prior to obligating funds made available under this heading on the NIH’s plans for obligating emergency funds: Provided further , That such amount is designated by the Congress as being for an emergency requirement pursuant to section 251(b)(2)(A)(i) of the Balanced Budget and Emergency Deficit Control Act of 1985. Office of the Secretary PUBLIC HEALTH AND SOCIAL SERVICES EMERGENCY FUND For an additional amount for Public Health and Social Services Emergency Fund , $4,500,000,000, to remain available until September 30, 2025, for the development of necessary countermeasures and vaccines, prioritizing platform-based technologies with U.S.-based manufacturing capabilities, the purchase of vaccines,