Hillary Clinton will be back on the campaign trail on Thursday, after spending several days at home recovering from pneumonia.
Campaign spokesman Nick Merrill said the Democratic nominee will resume normal campaign activities later this week.
Mrs Clinton is scheduled to address the Congressional Hispanic Caucus Institute dinner in Washington on Thursday evening and appear on The Tonight Show on Friday.
Her doctor diagnosed her with pneumonia on Friday and recommended she take five days off to rest, Mrs Clinton told CNN.
Her campaign did not disclose the illness until Sunday, after video circulated on social media showing her stumbling and being supported by aides after abruptly leaving a 9/11 memorial service in New York City.
She headed to her daughter's house in Manhattan before going to her suburban New York home, where she was examined by her physician. The doctor later said that Mrs Clinton was "rehydrated and recovering nicely".
The illness has largely kept Mrs Clinton out of the public eye at a pivotal time during the autumn election.
Mr Merrill said the Democratic nominee spent Tuesday reading briefing material, calling aides and watching President Barack Obama campaign on her behalf in Philadelphia.
Mrs Clinton had planned to campaign on Wednesday in Las Vegas. Former President Bill Clinton will headline that event in her place.
The nearly eight-hour gap between when Mrs Clinton was first reported to have stumbled and when her campaign disclosed her pneumonia has revived questions about her penchant for secrecy.
Facing criticism for her lack of transparency, Mrs Clinton has promised to release additional medical records. She has also expressed regret for failing to follow her doctor's orders for several days of rest.
"I probably would have been better off if I'd just pulled down my schedule on Friday," Mrs Clinton said in a Monday interview on CNN, adding: "I just didn't think it was going to be that big a deal."
After months of questioning Mrs Clinton's stamina, Republican rival Donald Trump has delivered a measured response on the issue.
"I hope she gets well soon," he said on Monday on Fox News. Mr Trump is expected to release more medical information about his own health this week.