Benedict stunned the world when he announced Feb. 11 that he would resign, citing his age and frail health.

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However, the BBC's Jonathan Head in Istanbul says they will not go to prison because of their age and frail health.

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At 75, he is in frail health yet often away on trips.

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If she does, she's so frail it can be very dangerous to her health.

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Diabetes patients may be active and otherwise healthy, but "on the other end of the spectrum are very frail, sick older patients with other major health problems, " says panel member Jeffrey Halter, director of the geriatrics center at the University of Michigan in Ann Arbor.

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