FIGURE 1.

(a) Timing of PCR test (left marker) and assessment (right marker) for COVID‐19 (orange squares) participants and controls (green circle). The length of each line represents the number of days between PCR testing and assessment. Confirmed cases in Ontario, Canada are shown in gray. (b) Number of days between PCR test and assessment. The black dotted line indicates 28 days, an established threshold beyond which symptoms can be considered part of the post‐COVID‐19 condition. Note that two participants in the COVID‐19 group were able to provide a negative PCR test before completion of a 14‐day quarantine. (c) Proportion of participants who self‐reported flu‐like symptoms. Faint bars indicate participants whose symptoms had resolved by the time of the assessment, whereas dark bars indicate participants with on‐going symptoms. (d) Representative and group‐averaged CBF maps from both groups.