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Health & Medicine

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Sneaker and tracker.

Every step counts

Researchers pinpoint how different types of physical activity affect cardiorespiratory fitness

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Senior citizen getting a vaccine.

The peril of 5 percent

Pockets of unvaccinated older people leave northern states vulnerable to COVID surge, expert warns

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India worker giving vaccines door to door.

Is delta unstoppable?

Public health experts say lessons from abroad suggest simple, familiar tactics can rein in the COVID variant

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Scientist with lab equipment.

Toward better medicine

Gift to propel precision medicine research, training at Harvard Medical School, Clalit Research Institute

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COVID-19 illustration.

Prognosis: Grim

Simulator shows that without more masks and vaccinations, delta variant could be riskiest yet

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Simone Biles.

Give her some space

Psychologist’s perspective on Simone Biles at the Olympics includes message for parents, coaches

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