Former U.S President Bill Clinton is recovering after two days of treatment for an infection in a California hospital, his doctors said.

The 75-year-old was admitted to the University of California Irvine Medical Center on Tuesday evening “for a non-COVID-19 infection,” Clinton spokesman Angel Urena said on Twitter.

“He is on the mend, in good spirits, and incredibly thankful to the doctors, nurses and staff providing him with excellent care,” Urena wrote.

The spokesman added to Reuters: “He’s up and about, joking and charming the hospital staff.”

Clinton went to the hospital after feeling fatigued and was diagnosed with an infection of the bloodstream that doctors believe started as a urinary tract infection.

The former president’s physicians, Alpesh Amin and Lisa Bardack, said he was “admitted to the hospital for close monitoring and administered IV antibiotics and fluids.”

“He remains at the hospital for continuous monitoring,” they said in a statement.

“After two days of treatment, his white blood cell count is trending down and he is responding to antibiotics well.”

They added: “We hope to have him go home soon.”

Doctors were cited saying Clinton was in the intensive care unit primarily to give him privacy.

Clinton, a Democrat who was president from 1993-2001, has had past health issues, including a 2004 quadruple bypass surgery and a 2010 procedure to open a blocked artery in his heart with two stents. It was reported that Clinton’s current hospital stay is not related to his heart issues.