; (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