Insiders say she began feeling “achy and exhausted” after last night’s three-hour performance but initially chalked it up to tour fatigue. When a rapid test confirmed the diagnosis this morning, her team scrambled to

reschedule the Chicago dates while implementing strict testing protocols for staff. “Every single band member, backup singer, and truck driver is being screened,” a source close to the tour told Variety. “Taylor’s livid—not for herself, but at the idea of anyone else getting sick.” Read more below