Former U.S. President Bill Clinton has been hospitalized after developing a fever, his spokesperson announced on Monday.

Clinton, 78, was admitted to MedStar Georgetown University Hospital in Washington, D.C., on Monday afternoon for “testing and observation,” according to his deputy chief of staff, Angel Ureña.

“He remains in good spirits and deeply appreciates the excellent care he is receiving,” Ureña said in a statement.

Clinton has faced several health challenges over the past two decades, primarily related to his heart. He underwent quadruple bypass surgery in 2004, had two coronary stents placed in 2010, and required surgery for a collapsed lung in 2005.

In 2021, he was hospitalized in California for several days due to a blood infection.

Despite his health issues, Clinton remains an active public figure. He delivered a speech at the Democratic National Convention in August, marking his 13th appearance at the event.

“Not a single day goes by, even though I’ve been gone for well over 23 years from the White House, that I don’t thank the Lord for the chance I had to serve,” Clinton said during his nearly 30-minute address.

He also reflected on his love for public service: “In the toughest times, even on the darkest days, if you tried hard enough, there was always something good you could do for somebody else.”

Toward the conclusion of his speech, Clinton remarked poignantly, “I have no idea how many more of these I’ll be able to come to.”

Clinton, who served as the 42nd President of the United States from 1993 to 2001, remains a significant figure in American politics, known for his economic policies and global initiatives. His hospitalization comes as he continues to balance health challenges with an active role in public service.