1. Short title This Act may be cited as the Disease X Act of 2023 . 2. Medical countermeasures for viral threats with pandemic potential (a) In general Section 319L(c)(4) of the Public Health Service Act (42 U.S.C. 247d–7e(c)(4)) is amended— (1) in subparagraph (D)— (A) in clause (ii), by striking ; and and inserting a semicolon; (B) by redesignating clause (iii) as clause (v); and (C) by inserting after clause (ii) the following: (iii) the identification and development of platform manufacturing technologies needed for advanced development and manufacturing of medical countermeasures for viral families which have significant potential to cause a pandemic; (iv) advanced research and development of flexible medical countermeasures against priority respiratory virus families and other respiratory viral pathogens with a significant potential to cause a pandemic, with both pathogen-specific and pathogen-agnostic approaches; and ; and (2) in subparagraph (F)— (A) in clause (ii), by striking ; and at the end and inserting a semicolon; (B) in clause (iii), by striking the period and inserting ; and ; and (C) by adding at the end the following: (iv) priority virus families and other viral pathogens with a significant potential to cause a pandemic. . (b) Funding Section 319L(d)(2) of the Public Health Service Act (42 U.S.C. 247d–7e(d)(2)) is amended— (1) by striking To carry out and inserting the following: (i) In general To carry out