  TREC-COVID is a community evaluation designed to build a test collection that
captures the information needs of biomedical researchers using the scientific
literature during a pandemic. One of the key characteristics of pandemic search
is the accelerated rate of change: the topics of interest evolve as the
pandemic progresses and the scientific literature in the area explodes. The
COVID-19 pandemic provides an opportunity to capture this progression as it
happens. TREC-COVID, in creating a test collection around COVID-19 literature,
is building infrastructure to support new research and technologies in pandemic
search.
