Since the pandemic began, numerous recovered COVID-19 patients have reported having “long COVID”: COVID-19 symptoms persisting well beyond the underlying viral infection period. Whether such a condition is specific to COVID-19, or more generally a form of “post-acute sequelae”—or even a discernable condition—has bedeviled scientists and clinicians alike. The fact remains, though, that likely millions of people in the U.S. alone will continue to report a variety of challenging symptoms more than 6 months after they’re infected. Despite this magnitude of reports, confusion regarding defining the condition and identifying its etiological basis has presented significant challenges to innovating treatments for it. In this post, we explore some of the current evidence surrounding “long COVID,” some of the difficulties in developing long COVID treatments, and how policymakers can move things along.