This is a sole-source federal contract award from the National Institute of Environmental Health Sciences (NIEHS) to Duke University for a COVID-19 mouse study. The $210,000 firm-fixed-price purchase order has a base period from April 2021 to April 2022, with a one-year option to April 2023. Duke University was selected because it has the required Biosafety Level 3 (BSL3) facilities and expertise in animal handling, mouse models of infectious disease, and mouse necropsy and tissue sampling. The contract was awarded under the authority of 41 U.S.C. 1901, which allows for sole-source procurements when there is only one responsible source. The contract does not have a set-aside designation.