Of course it may well be the case that there is no alternative to the old and infirm running nations in which the average age keeps falling to the 20s and lower, but it is a debate that will not go away.

BBC: African viewpoint: Death on the continent

Dr Cook-Deegan was one of the authors of a study that showed a significant risk of adverse selection in the market for long-term-care insurance (the sort bought by the young in order to ensure they have nursing care when they become old and infirm).

ECONOMIST: Genetics, medicine and insurance

Every year influenza kills 36, 000 people in the U.S., mostly the very young, very old and very infirm.

FORBES: Broken Eggs

Once a forceful feminist who brooked no argument, Ms. Choucair is too old at 97 and too infirm to fully appreciate that, at last, the international recognition she so deserved and craved has been accorded her.

WSJ: Review: Lebanon's Lost Modernist | 'Saloua Raouda Choucair' at Tate Modern in London

They had each taken many mortal lovers, but had cast them off before they could become old or infirm, and all their previous changelings had stayed healthy until they were returned, unaged and unstuck from their proper times, to the mortal world.

NEWYORKER: A Tiny Feast

But Leon's lawyer said his father was infirm in his old age and could not comprehend even simple legal issues.

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