As you surely know, this country’s covid vaccination effort has been plagued by major birth pangs: registration snafus, poor communication, faulty data and a scant supply of vaccine — all exacerbated by inequitable allocation, alleged political favoritism and unseemly jockeying for shots.

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Loss of muscle strength, speed and dexterity is a common consequence of aging and a well-established risk factor for death, disability and dementia. Yet, little is known about how and why motor decline occurs when it is not a symptom of disease.

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