pay and medical benefits of Public Health Service Commissioned Officers as authorized by law, for payments under the Retired Serviceman's Family Protection Plan and Survivor Benefit Plan, and for medical care of dependents and retired personnel under the Dependents' Medical Care Act, such amounts as may be required during the current fiscal year. Public health and social services emergency fund For expenses necessary to support activities related to countering potential biological, nuclear, radiological, chemical, and cybersecurity threats to civilian populations, and for other public health emergencies, $950,958,000, of which $511,700,000 shall remain available through September 30, 2019, for expenses necessary to support advanced research and development pursuant to section 319L of the PHS Act and other administrative expenses of the Biomedical Advanced Research and Development Authority: Provided , That funds provided under this heading for the purpose of acquisition of security countermeasures shall be in addition to any other funds available for such purpose: Provided further , That products purchased with funds provided under this heading may, at the discretion of the Secretary, be deposited in the Strategic National Stockpile pursuant to section 319F–2 of the PHS Act: Provided further , That $5,000,000 of the amounts made available to support emergency operations shall remain available through September 30, 2020. For expenses necessary for procuring security countermeasures (as defined in section 319F–2(c)(1)(B) of the PHS Act), $510,000,000, to remain available until expended. For an additional amount for expenses necessary to prepare for or respond to an influenza pandemic, $92,000,000