Former U.S. President Bill Clinton's health is improving but he will remain in a California hospital for at least another night to receive antibiotics intravenously for a urological infection that spread to his bloodstream, his spokesperson said on Friday.

The 75-year-old Clinton, who served as president from 1993 to 2001, entered the University of California Irvine Medical Center on Tuesday evening after suffering from fatigue. He spoke with President Joe Biden on Friday.

The former president's spokesperson Angel Urena said that Clinton's white blood count has decreased, indicating his health is improving.