Former President Bill Clinton was hospitalized in Washington after coming down with a fever, a senior adviser told NBC News on Monday.

Clinton, 78, “was admitted to MedStar Georgetown University Hospital for evaluation and observation after she developed a fever,” said Angel Ureña, Clinton’s deputy chief of staff.

“He is in good spirits and grateful for the care he is receiving,” Ureña said.

A source close to Clinton, the 42nd president, said the situation was “not urgent.”

“The former president will be fine,” the source said. “He developed a fever and wanted to be examined. He’s awake and alert.”

Clinton has faced a number of health problems since leaving office in 2001.

He underwent quadruple bypass surgery at NewYork-Presbyterian Hospital in 2004 and returned to the same hospital in 2010 for another heart procedure, during which two stents were inserted into a coronary artery.

He was also hospitalized in California for six days in 2021 due to a urological infection that spread to his bloodstream.

Clinton campaigned vigorously for Democratic presidential candidate Kamala Harris this year and recently published a memoir about his life after the presidency.

Clinton has spoken at every Democratic National Convention since 1976, including in August of this year.

“I want to say this from the bottom of my heart,” he said in that speech. “I have no idea how many more of them I can reach.”