The Contractor shall provide medical-expert services and medical reviewer/case management support for the National Vaccine Injury Compensation Program (VICP) and the Countermeasures Injury Compensation Program (CICP) in support of the litigation process, including the defense of petitions filed against the Secretary of Health and Human Services (HHS). This solicitation will remain open until August 24, 2026. Quotes will be reviewed, and BPAs may be issued on a rolling basis as quotes are received. The Government anticipates establishing BPAs with qualified vendors during this open period.