Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonJoe Biden looks to expand election battleground into Trump country Biden leads Trump by 12 points among Catholic voters: poll The Hill's Campaign Report: Biden goes on offense MORE will return to the campaign trail on Thursday, following a brief break as she recovers from pneumonia.

The campaign announced late Tuesday evening that she will deliver remarks in Greensboro, N.C. on Thursday and "discuss her vision for an America that is stronger together."

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"She has spent the day catching up on reading briefings, making calls, and she watched President Obama's speech in Philadelphia on TV," Clinton spokesman Nick Merrill said, according to CNN.

Clinton left a 9/11 memorial early Sunday after she became dehydrated and overheated. She went to her daughter Chelsea's apartment before returning to her home in Chappaqua, N.Y.

Her doctor released a statement later Sunday saying the Democratic nominee had been diagnosed Friday with pneumonia.

She subsequently canceled scheduled trips to California and Nevada.

Since the incident Sunday, many questions have been raised regarding Clinton's health.

Updated 8:34 p.m.