(CNN) - The Reverend Billy Graham's son is requesting prayers for his ailing father.
In a note posted online, Franklin Graham said his father is "Extremely weak but his vitals are good." The elder Graham celebrated his 95th birthday on November 7th. Since then, the family says he was briefly hospitalized for a respiratory infection.
Reverend Billy Graham, who lives in western North Carolina, has provided counsel to generations of U.S. Presidents, beginning with Harry S. Truman.