HOUSTON (AP) — Former President George H.W. Bush remains in stable condition two weeks after entering a Houston hospital for treatment of a lingering bronchitis-related cough.

Methodist Hospital spokesman George Kovacik (koh-VAH’-chik) said Friday that 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.

His doctors have said Bush became more physically active this week.

Bush and his wife, Barbara, divide their time between their residences in Houston and Kennebunkport, Maine.