Methodist Hospital spokesman George Kovacik (koh-VAH'-chik) said Saturday the 88-year-old Bush continues to improve, but doctors are being cautious with his care.
Kovacik says physicians have provided no timeline for when the 41st president will be discharged. Bush was admitted to the hospital the day after Thanksgiving. He had a weeklong stay for the same illness earlier in November.
Bush and his wife, Barbara, divide their time between their residences in Houston and Kennebunkport, Maine.