D.2.d JOFOC_Contract 75D30120C07986_Westat (12-23-21 1019) (Redacted).pdf

This document provides a justification and approval for a modification to contract number 75D30120C07986 awarded to Westat, Inc. by the Centers for Disease Control and Prevention. The modification, awarded on February 7, 2022 for $23,363,420, expands the scope of the original contract to establish a virtual network for investigating COVID-19. Key changes include assessing vaccine effectiveness among new populations like children recommended for vaccination, comparing benefits of booster doses, and evaluating vaccine effectiveness over time and against new variants. The contractor will include up to four additional study sites, extract and manage more patient data, conduct additional analysis and more frequent reporting. The period of performance is extended by one year to September 2023 to assess populations now recommended for vaccination and their vaccination regimens. Westat was determined to be the only responsible source capable of providing the modified work due to having completed initial tasks, managing subcontracts, and systems for required evaluations.