Former US President George HW Bush's fever has worsened with doctors putting him on a liquids-only diet, a spokesman for his hospital in Texas has confirmed.
But Jim McGrath said doctors were "cautiously optimistic" about the course of treatment he is on.
Mr McGrath, who was quoted by the Associated Press, said doctors still do not know what is causing the 88-year-old's "stubborn" fever, despite treating it with Tylenol.
Mr Bush was brought to the Houston hospital for the bronchitis-like cough on November 23.
More top news
A row erupted after claims refugees living in Middlesbrough were housed in properties with red doors that made them targets for racism.
The female bamboo shark, which has had no contact with any males for more than two years has produced two fertile eggs, experts said.
An angry mum claims a manager for celebrity chef Sat Bains called her a "bad mother" when she cancelled a booking as her daughter was ill.